mm: Remove __delete_from_page_cache()

This wrapper is no longer used.  Remove it and all references to it.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index b85661c..a859486 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1935,7 +1935,7 @@ int memory_failure(unsigned long pfn, int flags)
 
 	/*
 	 * Now take care of user space mappings.
-	 * Abort on fail: __delete_from_page_cache() assumes unmapped page.
+	 * Abort on fail: __filemap_remove_folio() assumes unmapped page.
 	 */
 	if (!hwpoison_user_mappings(p, pfn, flags, p)) {
 		action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);