f2fs: Remove f2fs_write_node_page()

Mappings which implement writepages should not implement writepage
as it can only harm writeback patterns.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Author: Matthew Wilcox (Oracle)

fs/f2fs/node.c

@@ -1816,13 +1816,6 @@ int f2fs_move_node_page(struct page *node_page, int gc_type)
 	return err;
 }
 
-static int f2fs_write_node_page(struct page *page,
-				struct writeback_control *wbc)
-{
-	return __write_node_page(page, false, NULL, wbc, false,
-						FS_NODE_IO, NULL);
-}
-
 int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
 			struct writeback_control *wbc, bool atomic,
 			unsigned int *seq_id)
@@ -2249,7 +2242,6 @@ static bool f2fs_dirty_node_folio(struct address_space *mapping,
  * Structure of the f2fs node operations
  */
 const struct address_space_operations f2fs_node_aops = {
-	.writepage	= f2fs_write_node_page,
 	.writepages	= f2fs_write_node_pages,
 	.dirty_folio	= f2fs_dirty_node_folio,
 	.invalidate_folio = f2fs_invalidate_folio,