btrfs: send: cleanup unneeded return variable in changed_verity()

As all changed_* functions need to return something, just return 0
directly here, as the verity status is passed via the context.

Reported by LKP: fs/btrfs/send.c:6877:5-8: Unneeded variable: "ret". Return "0" on line 6883

Reported-by: kernel test robot <[email protected]>
Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Christian Heusel <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: christian-heusel

fs/btrfs/send.c

@@ -7190,13 +7190,11 @@ static int changed_extent(struct send_ctx *sctx,
 
 static int changed_verity(struct send_ctx *sctx, enum btrfs_compare_tree_result result)
 {
-	int ret = 0;
-
 	if (!sctx->cur_inode_new_gen && !sctx->cur_inode_deleted) {
 		if (result == BTRFS_COMPARE_TREE_NEW)
 			sctx->cur_inode_needs_verity = true;
 	}
-	return ret;
+	return 0;
 }
 
 static int dir_changed(struct send_ctx *sctx, u64 dir)