Remove old Link branding (stripe#3516)

## Summary
- Removes old Link branding.

## Motivation
https://jira.corp.stripe.com/browse/RUN_MOBILESDK-3108

## Testing
<!-- How was the code tested? Be as specific as possible. -->

## Changelog
N/A

Stripe/StripeiOSTests/PayWithLinkButtonSnapshotTests.swift

@@ -64,55 +64,7 @@ class PayWithLinkButtonSnapshotTests: STPSnapshotTestCase {
     }
 
     func testRegistered_withLongEmailAddress() {
-        let sut = makeSUT(useNewBrand: true)
-        sut.linkAccount = makeAccountStub(email: longEmailAddress, isRegistered: true)
-        verify(sut)
-    }
-
-    func testDefault_legacy() {
-        let sut = makeSUT(useNewBrand: false)
-        sut.linkAccount = makeAccountStub(email: emailAddress, isRegistered: false)
-        verify(sut)
-
-        sut.isHighlighted = true
-        verify(sut, identifier: "Highlighted")
-    }
-
-    func testDefault_rounded_legacy() {
-        let sut = makeSUT(useNewBrand: false)
-        sut.cornerRadius = 16
-        sut.linkAccount = makeAccountStub(email: emailAddress, isRegistered: false)
-        verify(sut)
-    }
-
-    func testDisabled_legacy() {
-        let sut = makeSUT(useNewBrand: false)
-        sut.isEnabled = false
-        verify(sut)
-    }
-
-    func testRegistered_legacy() {
-        let sut = makeSUT(useNewBrand: false)
-        sut.linkAccount = makeAccountStub(email: emailAddress, isRegistered: true)
-        verify(sut)
-    }
-
-    func testRegistered_rounded_legacy() {
-        let sut = makeSUT(useNewBrand: false)
-        sut.cornerRadius = 16
-        sut.linkAccount = makeAccountStub(email: emailAddress, isRegistered: true)
-        verify(sut)
-    }
-
-    func testRegistered_square_legacy() {
-        let sut = makeSUT(useNewBrand: false)
-        sut.cornerRadius = 0
-        sut.linkAccount = makeAccountStub(email: emailAddress, isRegistered: true)
-        verify(sut)
-    }
-
-    func testRegistered_withLongEmailAddress_legacy() {
-        let sut = makeSUT(useNewBrand: false)
+        let sut = makeSUT()
         sut.linkAccount = makeAccountStub(email: longEmailAddress, isRegistered: true)
         verify(sut)
     }
@@ -143,8 +95,7 @@ extension PayWithLinkButtonSnapshotTests {
         )
     }
 
-    fileprivate func makeSUT(useNewBrand: Bool = true) -> PayWithLinkButton {
-        LinkUI.useNewBrand = useNewBrand
+    fileprivate func makeSUT() -> PayWithLinkButton {
         return PayWithLinkButton()
     }
 

StripePaymentSheet/StripePaymentSheet/Source/Helpers/Images.swift

@@ -34,7 +34,6 @@ enum Image: String, CaseIterable, ImageMaker {
     case pm_type_p24 = "icon-pm-p24"
     case pm_type_sepa = "icon-pm-sepa"
     case pm_type_paypal = "icon-pm-paypal"
-    case pm_type_link_deprecated = "icon-pm-link-deprecated"
     case pm_type_upi = "icon-pm-upi"
     case pm_type_cashapp = "icon-pm-cashapp"
     case pm_type_revolutpay = "icon-pm-revolutpay"
@@ -59,8 +58,6 @@ enum Image: String, CaseIterable, ImageMaker {
     case link_logo = "link_logo"
     case link_logo_bw = "link_logo_bw"
     case link_logo_knockout = "link_logo_knockout"
-    case link_logo_deprecated = "link_logo_deprecated"
-    case link_arrow_deprecated = "link_arrow_deprecated"
 
     // Carousel
     case carousel_applepay
@@ -73,7 +70,6 @@ enum Image: String, CaseIterable, ImageMaker {
     case carousel_card_unionpay
     case carousel_card_unknown
     case carousel_card_visa
-    case carousel_link_deprecated
     case carousel_sepa
 
     // Affirm Images

StripePaymentSheet/StripePaymentSheet/Source/Internal/Link/Extensions/UIColor+Link.swift

@@ -18,14 +18,14 @@ extension UIColor {
     ///
     /// Use it as accent color for controls and activity indicators.
     static var linkBrand: UIColor {
-        LinkUI.useNewBrand ? UIColor(red: 0, green: 0.84, blue: 0.44, alpha: 1.0) : UIColor(red: 0.2, green: 0.867, blue: 0.702, alpha: 1.0)
+        UIColor(red: 0, green: 0.84, blue: 0.44, alpha: 1.0)
     }
 
     /// Level 400 variant of Link brand color.
     ///
     /// Use for separator bars over the Link brand color.
     static var linkBrand400: UIColor {
-        LinkUI.useNewBrand ? UIColor(red: 0.0, green: 0.64, blue: 0.33, alpha: 1.0) : UIColor(red: 0.102, green: 0.773, blue: 0.608, alpha: 1.0)
+        UIColor(red: 0.0, green: 0.64, blue: 0.33, alpha: 1.0)
     }
 
     /// Color of the Link logo in the navigation bar.
@@ -36,7 +36,7 @@ extension UIColor {
 
     /// Foreground color of the primary button.
     static var linkPrimaryButtonForeground: UIColor {
-        LinkUI.useNewBrand ? UIColor(red: 0, green: 0.12, blue: 0.06, alpha: 1.0) : UIColor(red: 0.012, green: 0.141, blue: 0.149, alpha: 1.0)
+        UIColor(red: 0, green: 0.12, blue: 0.06, alpha: 1.0)
     }
 
 }

StripePaymentSheet/StripePaymentSheet/Source/Internal/Link/LinkUI.swift

@@ -52,10 +52,6 @@ enum LinkUI {
     static let smallContentSpacing: CGFloat = 8
 
     static let tinyContentSpacing: CGFloat = 4
-
-    /// Enable 2024 brand
-    /// Delete this after rollout. (~May 2024)
-    @_spi(STP) public static var useNewBrand = false
 }
 
 // MARK: Development flags

StripePaymentSheet/StripePaymentSheet/Source/Internal/Link/Views/LinkMoreInfoView.swift

@@ -16,18 +16,13 @@ import UIKit
 final class LinkMoreInfoView: UIView {
     struct Constants {
         static var logoWidth: CGFloat {
-            LinkUI.useNewBrand ? 42 : 31
+            42
         }
         static let logoHeight: CGFloat = 14
     }
     private lazy var logoView: UIImageView = {
         let imageView: UIImageView
-        if LinkUI.useNewBrand {
-            imageView = DynamicImageView(dynamicImage: Image.link_logo_knockout.makeImage(template: false), pairedColor: theme.colors.background)
-        } else {
-            imageView = UIImageView(image: Image.link_logo_deprecated.makeImage(template: true))
-            imageView.tintColor = theme.colors.secondaryText
-        }
+        imageView = DynamicImageView(dynamicImage: Image.link_logo_knockout.makeImage(template: false), pairedColor: theme.colors.background)
         imageView.translatesAutoresizingMaskIntoConstraints = false
         imageView.contentMode = .scaleAspectFit
         imageView.isAccessibilityElement = true

StripePaymentSheet/StripePaymentSheet/Source/PaymentSheet/Link/LinkPaymentController.swift

@@ -48,7 +48,7 @@ import UIKit
     @_spi(LinkOnly) public var paymentOption: PaymentOptionDisplayData? {
         if paymentMethodId == nil { return nil }
 
-        return PaymentOptionDisplayData(image: (LinkUI.useNewBrand ? Image.link_logo : Image.pm_type_link_deprecated).makeImage(), label: STPPaymentMethodType.link.displayName)
+        return PaymentOptionDisplayData(image: Image.link_logo.makeImage(), label: STPPaymentMethodType.link.displayName)
     }
 
     /// The parent view controller to present

StripePaymentSheet/StripePaymentSheet/Source/PaymentSheet/PaymentOption+Images.swift

@@ -26,7 +26,7 @@ extension PaymentOption {
         case .new(let confirmParams):
             return confirmParams.makeIcon(updateImageHandler: updateImageHandler)
         case .link:
-            return (LinkUI.useNewBrand ? Image.link_logo : Image.pm_type_link_deprecated).makeImage()
+            return Image.link_logo.makeImage()
         case .external(let paymentMethod, _):
             return PaymentSheet.PaymentMethodType.external(paymentMethod).makeImage(
                 forDarkBackground: traitCollection?.isDarkMode ?? false,
@@ -46,7 +46,7 @@ extension PaymentOption {
             assertionFailure("This shouldn't be called - we don't show new PMs in the saved PM collection view")
             return UIImage()
         case .link:
-            return (LinkUI.useNewBrand ? Image.link_logo : Image.carousel_link_deprecated).makeImage(template: false)
+            return Image.link_logo.makeImage()
         case .external:
             assertionFailure("This shouldn't be called - we don't show EPMs in the saved PM collection view")
             return UIImage()
@@ -91,7 +91,7 @@ extension STPPaymentMethod {
         case .SEPADebit:
             return Image.carousel_sepa.makeImage().withRenderingMode(.alwaysOriginal)
         case .link:
-            return (LinkUI.useNewBrand ? Image.link_logo : Image.pm_type_link_deprecated).makeImage().withRenderingMode(.alwaysOriginal)
+            return Image.link_logo.makeImage().withRenderingMode(.alwaysOriginal)
         default:
             assertionFailure("\(type) not supported for saved PMs")
             return makeIcon()

StripePaymentSheet/StripePaymentSheet/Source/PaymentSheet/PaymentSheetLoader.swift

@@ -84,10 +84,6 @@ final class PaymentSheetLoader {
                     && configuration.applePay != nil
                     && intent.isApplePayEnabled
 
-                // If Link is enabled, set the `useNewBrand`
-                // Should default to true in case we remove the server-side flag someday
-                LinkUI.useNewBrand = intent.elementsSession.linkSettings?.useRebrand ?? true
-
                 // Send load finished analytic
                 // This is hacky; the logic to determine the default selected payment method belongs to the SavedPaymentOptionsViewController. We invoke it here just to report it to analytics before that VC loads.
                 let (defaultSelectedIndex, paymentOptionsViewModels) = SavedPaymentOptionsViewController.makeViewModels(