Revert "ANDROID: vfs: Add setattr2 for filesystems with per mount permissions"

This reverts commit 74cca90e as sdcardfs
is now gone.

Bug: 157700134
Cc: Daniel Rosenberg <drosen@google.com>
Cc: Yongqin Liu <yongqin.liu@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ie67083f34797ed5187194b173fa034b125b1477f