ext4: delete invalid comments near mb_buddy_adjust_border

The comment near mb_buddy_adjust_border seems meaningless, just
clear it.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Link: https://lore.kernel.org/r/1601292995-32205-1-git-send-email-brookxu@tencent.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/mballoc.c

@@ -1394,9 +1394,6 @@ void ext4_set_bits(void *bm, int cur, int len)
 	}
 }
 
-/*
- * _________________________________________________________________ */
-
 static inline int mb_buddy_adjust_border(int* bit, void* bitmap, int side)
 {
 	if (mb_test_bit(*bit + side, bitmap)) {