xfs: remove unused xfs_sb_version_has wrappers

xfs: remove unused xfs_sb_version_has wrappers

Source kernel commit: 2beb7b50ddd429f47b6cabd186b3102d2a6aa505

The vast majority of these wrappers are now unused. Remove them
leaving just the small subset of wrappers that are used to either
add feature bits or make the mount features field setup code
simpler.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>