maple_tree: remove extra return statement

For functions with a return type of void, it is unnecessary to
add a reurn statement at the end of the function, so drop it.

Link: https://lkml.kernel.org/r/20221221060058.609003-3-vernon2gm@gmail.com
Signed-off-by: Vernon Yang <vernon2gm@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/maple_tree.c

@@ -1276,7 +1276,6 @@ nomem_one:
 	if (mas->alloc && !(((unsigned long)mas->alloc & 0x1)))
 		mas->alloc->total = success;
 	mas_set_err(mas, -ENOMEM);
-	return;
 }
 
 /*
@@ -4712,8 +4711,6 @@ retry:
 	mas_state_walk(mas);
 	if (mas_is_start(mas))
 		goto retry;
-
-	return;
 }
 
 /*