mm/truncate.c: remove unneeded variable

Return value directly instead of taking this in another redundant
variable.

Link: https://lkml.kernel.org/r/20211207083222.401594-1-chi.minghao@zte.com.cnSigned-off-by: chiminghao <chi.minghao@zte.com.cn>
Reported-by: Zeal Robot <zealci@zte.com.cm>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/truncate.c

@@ -205,7 +205,6 @@ static void truncate_cleanup_page(struct page *page)
 static int
 invalidate_complete_page(struct address_space *mapping, struct page *page)
 {
-	int ret;
 
 	if (page->mapping != mapping)
 		return 0;
@@ -213,9 +212,7 @@ invalidate_complete_page(struct address_space *mapping, struct page *page)
 	if (page_has_private(page) && !try_to_release_page(page, 0))
 		return 0;
 
-	ret = remove_mapping(mapping, page);
-
-	return ret;
+	return remove_mapping(mapping, page);
 }
 
 int truncate_inode_page(struct address_space *mapping, struct page *page)