Drop the fips feature

[simonmarty]

Description

Why is this change being made?

1. rustls dropped the fips feature in rustls/rustls@13da394

What is changing?

1. Remove the feature and associated documentation. This is technically a breaking change.

Related Links

• Issue #, if available:

---

Testing

How was this tested?

When testing locally, provide testing artifact(s):

---

Reviewee Checklist

Update the checklist after submitting the PR

• I have reviewed, tested and understand all changes
  If not, why:
• I have filled out the Description and Testing sections above
  If not, why:
• Build and Unit tests are passing
  If not, why:
• Unit test coverage check is passing
  If not, why:
• Integration tests pass locally
  If not, why: Running them in GH actions
• I have updated integration tests (if needed)
  If not, why:
• I have ensured no sensitive information is leaking (i.e., no logging of sensitive fields, or otherwise)
  If not, why:
• I have added explanatory comments for complex logic, new classes/methods and new tests
  If not, why:
• I have updated README/documentation (if needed)
  If not, why:
• I have clearly called out breaking changes (if any)
  If not, why:

---

Reviewer Checklist

All reviewers please ensure the following are true before reviewing:

• Reviewee checklist has been accurately filled out
• Code changes align with stated purpose in description
• Test coverage adequately validates the changes

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.14%. Comparing base (49af71f) to head (c49e8de).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #179   +/-   ##
=======================================
  Coverage   92.14%   92.14%           
=======================================
  Files          14       14           
  Lines        2405     2405           
  Branches     2405     2405           
=======================================
  Hits         2216     2216           
  Misses        143      143           
  Partials       46       46           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.