[GFS2] Remove support for unused and pointless flag

The ability to mark files for direct i/o access when opened
normally is both unused and pointless, so this patch removes
support for that feature.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/sys.c

@@ -412,7 +412,6 @@ TUNE_ATTR(max_readahead, 0);
 TUNE_ATTR(complain_secs, 0);
 TUNE_ATTR(statfs_slow, 0);
 TUNE_ATTR(new_files_jdata, 0);
-TUNE_ATTR(new_files_directio, 0);
 TUNE_ATTR(quota_simul_sync, 1);
 TUNE_ATTR(quota_cache_secs, 1);
 TUNE_ATTR(stall_secs, 1);
@@ -441,7 +440,6 @@ static struct attribute *tune_attrs[] = {
 	&tune_attr_quotad_secs.attr,
 	&tune_attr_quota_scale.attr,
 	&tune_attr_new_files_jdata.attr,
-	&tune_attr_new_files_directio.attr,
 	NULL,
 };