Revert "pps: fix poll support"

This reverts commit a891b456 which is
commit 12c409aa 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: I918d095eb98d71afe824d6b1dfe9a53bb94e312b
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>