ext4: Remove unnecessary call to ext4_get_group_desc() in mballoc

Signed-off-by: NJing Zhang <zj.barak@gmail.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/ext4/mballoc.c

@@ -2025,7 +2025,6 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 
 		for (i = 0; i < ngroups; group++, i++) {
 			struct ext4_group_info *grp;
-			struct ext4_group_desc *desc;
 
 			if (group == ngroups)
 				group = 0;
@@ -2048,7 +2047,6 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 			}
 
 			ac->ac_groups_scanned++;
-			desc = ext4_get_group_desc(sb, group, NULL);
 			if (cr == 0)
 				ext4_mb_simple_scan_group(ac, &e4b);
 			else if (cr == 1 &&