Revert "bpf: Fix oob access in cgroup local storage"

This reverts commit 41688d1f which is
commit abad3d0b upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I9f58beba10f556a1ad18d6a31cf8b070cd9c656e
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>