chore(flags): rm flag distribution feature flag from BE

[jasonyuezhang]

---

Copied from getsentry#101000
Original PR: getsentry#101000

[propel-test-bot]

Remove organizations:feature-flag-distribution-flyout Feature Flag from Backend

This pull request deletes the registration and associated comment for the organizations:feature-flag-distribution-flyout feature flag within the backend feature manager. It removes two lines from the register_temporary_features function in src/sentry/features/temporary.py, effectively eliminating this temporary feature flag from the backend.

Key Changes

• Deleted the comment describing the feature flag distribution flyout in src/sentry/features/temporary.py.
• Removed the manager.add("organizations:feature-flag-distribution-flyout", ...) line from the backend feature flag registration.

Affected Areas

• src/sentry/features/temporary.py (feature flag registration)

This summary was automatically generated by @propel-code-bot