Revert "bpf: check changes_pkt_data property for extension programs"

This reverts commit 3846e2be which is
commit 81f6d053 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: Iad790b1cf2b6235887063f8cd4f531a0eea52e9c
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>