Revert "ANDROID: security,perf: Allow further restriction of perf_event_open"

Unfork Android.

This reverts commit 5dbd8df7.

Perf_event_paranoid=3 is no longer needed on Android. Access control
of perf events is now done by selinux. See:
https://patchwork.kernel.org/patch/11185793/



IGNORE_MERGE_CONFLICT_CHECK==kernel.rst documentation uses "====".

Bug: 120445712
Bug: 137092007
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: Iba493424174b30baff460caaa25a54a472c87bd4