Revert "geneve: make sure to pull inner header in geneve_rx()"

This reverts commit c7137900 which is
commit 1ca1ba46 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: I64aa85a2666f61fb1589d8ed8531750bac1e43fc
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>