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

This reverts commit 59d2a407 which is
commit 1ca1ba465e55b9460e4e75dec9fff31e708fec74 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: I2b2aff69a954b1ed5f1218aa043be79b1cac0bb0
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>