ext4: fix a doubled word "need" in a comment

Signed-off-by: Xiang wangx <wangxiang@cdjrlc.com>
Link: https://lore.kernel.org/r/20220605091503.12513-1-wangxiang@cdjrlc.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/migrate.c

@@ -438,7 +438,7 @@ int ext4_ext_migrate(struct inode *inode)
 
 	/*
 	 * Worst case we can touch the allocation bitmaps and a block
-	 * group descriptor block.  We do need need to worry about
+	 * group descriptor block.  We do need to worry about
 	 * credits for modifying the quota inode.
 	 */
 	handle = ext4_journal_start(inode, EXT4_HT_MIGRATE,