Remove CPU profiler from Ray Service Replica, Proxy & Controller

[ok-scale]

Why are these changes needed?

The method ray.serve._private.replica.ReplicaActor._save_cpu_profile_data accesses two non-existent instance attributes, self.cpu_profiler and self.cpu_profiler_log. This PR removes the method and the associated variables as there is no usage.

They can be added back by referencing git history.

Related issue number

Closes #53677

Checks

• I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
  • I've added any new APIs to the API Reference. For example, if I added a
    method in Tune, I've added it in doc/source/tune/api/ under the
    corresponding .rst file.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(

[Copilot]

Pull Request Overview

This PR removes unused CPU profiling code from the Ray Serve replica, proxy, and controller components.

• Eliminates configure_component_cpu_profiler imports and initializations.
• Deletes the _save_cpu_profile_data methods.
• Removes the now-unneeded marshal import.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
python/ray/serve/_private/replica.py	Removed CPU profiler import, initialization, and save method
python/ray/serve/_private/proxy.py	Removed CPU profiler import, initialization, and save method
python/ray/serve/_private/controller.py	Removed marshal import, CPU profiler import, initialization, and save method

[abrarsheikh]

Ok to remove profiling from all replica/controller/proxy since I don't think its part of anyones workflow.
But I want to also note that the reported issue is only with replica; proxy and controller cpu profiler should be correctly.

[zcin]

if we're removing all usage then let's also remove configure_component_cpu_profiler and RAY_SERVE_ENABLE_CPU_PROFILING