remove most of JobApplicationStepProcess apart from the step groups

app/controllers/jobseekers/job_applications/base_controller.rb

@@ -5,7 +5,6 @@ class Jobseekers::JobApplications::BaseController < Jobseekers::BaseController
 
   def step_process
     Jobseekers::JobApplications::JobApplicationStepProcess.new(
-      current_step || :review,
       job_application: job_application,
     )
   end

app/services/jobseekers/job_applications/job_application_step_process.rb

@@ -1,21 +1,28 @@
-class Jobseekers::JobApplications::JobApplicationStepProcess < StepProcess
-  attr_reader :job_application
+module Jobseekers
+  module JobApplications
+    class JobApplicationStepProcess
+      def initialize(job_application:)
+        @job_application = job_application
 
-  def initialize(current_step, job_application:)
-    @job_application = job_application
+        @step_groups = {
+          personal_details: %i[personal_details],
+          professional_status: %i[professional_status],
+          qualifications: %i[qualifications],
+          training_and_cpds: %i[training_and_cpds],
+          employment_history: %i[employment_history],
+          personal_statement: %i[personal_statement],
+          references: %i[references],
+          equal_opportunities: %i[equal_opportunities],
+          ask_for_support: %i[ask_for_support],
+          declarations: %i[declarations],
+          review: %i[review],
+        }
+      end
 
-    super(current_step, {
-      personal_details: %i[personal_details],
-      professional_status: %i[professional_status],
-      qualifications: %i[qualifications],
-      training_and_cpds: %i[training_and_cpds],
-      employment_history: %i[employment_history],
-      personal_statement: %i[personal_statement],
-      references: %i[references],
-      equal_opportunities: %i[equal_opportunities],
-      ask_for_support: %i[ask_for_support],
-      declarations: %i[declarations],
-      review: %i[review],
-    })
+      # Returns the keys of all individual steps in order
+      def steps
+        @step_groups.values.flatten
+      end
+    end
   end
 end

app/services/jobseekers/job_applications/prefill_job_application_from_previous_application.rb

@@ -83,7 +83,7 @@ def relevant_steps
     # The step process is needed in order to filter out the steps that are not relevant to the new job application,
     # for eg. professional status - see https://github.com/DFE-Digital/teaching-vacancies/blob/75cec792d9e229fb866bdafc017f82501bd01001/app/services/jobseekers/job_applications/job_application_step_process.rb#L23
     # The review step is used as a current step is required.
-    Jobseekers::JobApplications::JobApplicationStepProcess.new(:review, job_application: new_job_application).steps
+    Jobseekers::JobApplications::JobApplicationStepProcess.new(job_application: new_job_application).steps
   end
 
   def completed_steps