Remove unused function

Change-Id: I327f79f4b2f8008485e989156419d01de373078a

oak_functions_test_utils/BUILD

@@ -35,7 +35,6 @@ rust_library(
         "//oak_proto_rust",
         "@oak_crates_index//:anyhow",
         "@oak_crates_index//:command-group",
-        "@oak_crates_index//:duct",
         "@oak_crates_index//:nix",
         "@oak_crates_index//:once_cell",
         "@oak_crates_index//:port_check",

oak_functions_test_utils/Cargo.toml

@@ -8,7 +8,6 @@ license = "Apache-2.0"
 [dependencies]
 anyhow = "*"
 command-group = "*"
-duct = "*"
 log = "*"
 http = "*"
 hyper = { version = "*", features = ["client", "http1", "runtime", "server"] }

oak_functions_test_utils/src/lib.rs

@@ -29,13 +29,9 @@ pub static OAK_RESTRICTED_KERNEL_WRAPPER_BIN: Lazy<PathBuf> = Lazy::new(|| {
     ])
 });
 
-use std::{
-    collections::HashMap, future::Future, io::Write, path::PathBuf, pin::Pin, task::Poll,
-    time::Duration,
-};
+use std::{collections::HashMap, future::Future, io::Write, path::PathBuf, pin::Pin, task::Poll};
 
 use command_group::stdlib::CommandGroup;
-use nix::unistd::Pid;
 use oak_client::verifier::InsecureAttestationVerifier;
 use oak_functions_abi::Response;
 use oak_functions_client::OakFunctionsClient;
@@ -143,19 +139,6 @@ pub fn rust_crate_enclave_out_path(crate_name: &str) -> String {
     )
 }
 
-/// Kills all the processes identified by the provided handle.
-///
-/// First tries to send them a `SIGINT` signal, then, if they are still running,
-/// it sends them a `SIGKILL` signal.
-pub fn kill_process(handle: duct::ReaderHandle) {
-    handle.pids().iter().for_each(|pid| {
-        nix::sys::signal::kill(Pid::from_raw(*pid as i32), nix::sys::signal::SIGINT).unwrap()
-    });
-    // Wait for the process to terminate cleanly, then forcefully kill it.
-    std::thread::sleep(Duration::from_secs(2));
-    handle.kill().unwrap();
-}
-
 /// A wrapper around a termination signal [`oneshot::Receiver`].
 ///
 /// This type manually implements [`Future`] in order to be able to be passed to