Revert "ANDROID: vendor_hooks: Add hooks to tcp/udp send/recv msg functions."

This reverts commit e4e3aadd.

The hooks android_rvh_tcp_sendmsg_locked, android_rvh_tcp_recvmsg,
android_rvh_udp_sendmsg, android_rvh_udp_recvmsg, and
android_rvh_tcp_recvmsg_stat, are not used by any vendor, so remove it
to help with merge issues with future LTS releases.

If they are needed by any real user, it can easily be reverted to add
them back and then the symbols should be added to the abi list at the
same time to prevent it from being removed again later.

Bug: 190523684
Bug: 203756332
Cc: Liangliang Li <liliangliang@vivo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Id562bc858612e059b1605655128783042740ff8a