generic/23[23]: some cleanups

1. remove $seqres.full before test
2. no need to check return values of _fsstress and _check_quota_usage
   calls, the golden image could catch the failures.
3. remove unused FSX related variables

Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/generic/233

@@ -38,9 +38,6 @@ trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
 . ./common/filter
 . ./common/quota
 
-FSX_FILE_SIZE=64000000
-FSX_ARGS="-q -l $FSX_FILE_SIZE -o 65536 -S 191110531 -N 100000"
-
 _filter_num()
 {
 	tee -a $seqres.full |\
@@ -79,24 +76,15 @@ _require_quota
 _require_user
 _need_to_be_root
 
-_scratch_mkfs >> $seqres.full 2>&1
+_scratch_mkfs > $seqres.full 2>&1
 _scratch_mount "-o usrquota,grpquota"
 chmod 777 $SCRATCH_MNT
 quotacheck -u -g $SCRATCH_MNT 2>/dev/null
 quotaon -u -g $SCRATCH_MNT 2>/dev/null
 setquota -u $qa_user 32000 32000 1000 1000 $SCRATCH_MNT 2>/dev/null
 
-if ! _fsstress; then
-	_scratch_unmount 2>/dev/null
-	exit
-fi
-
-if ! _check_quota_usage; then
-	_scratch_unmount 2>/dev/null
-	status=1
-	exit
-fi
-
-_scratch_unmount 2>/dev/null
+_fsstress
+_check_quota_usage
+_scratch_unmount
 status=0
 exit