ext4: remove the repeated comment of ext4_trim_all_free

Reviewed-by: NAndreas Dilger <adilger@dilger.ca>
Signed-off-by: NWang Jianchao <wangjianchao@kuaishou.com>
Reviewed-by: NJan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210724074124.25731-4-jianchao.wan9@gmail.comSigned-off-by: NTheodore Ts'o <tytso@mit.edu>

fs/ext4/mballoc.c

@@ -6274,15 +6274,10 @@ static int ext4_try_to_trim_range(struct super_block *sb,
  * @max:		last group block to examine
  * @minblocks:		minimum extent block count
  *
- * ext4_trim_all_free walks through group's buddy bitmap searching for free
- * extents. When the free block is found, ext4_trim_extent is called to TRIM
- * the extent.
- *
- *
  * ext4_trim_all_free walks through group's block bitmap searching for free
  * extents. When the free extent is found, mark it as used in group buddy
  * bitmap. Then issue a TRIM command on this extent and free the extent in
- * the group buddy bitmap. This is done until whole group is scanned.
+ * the group buddy bitmap.
  */
 static ext4_grpblk_t
 ext4_trim_all_free(struct super_block *sb, ext4_group_t group,