ntfs: Remove check for PageError

If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

fs/ntfs/file.c

@@ -219,11 +219,6 @@ static int ntfs_attr_extend_initialized(ntfs_inode *ni, const s64 new_init_size)
 			err = PTR_ERR(page);
 			goto init_err_out;
 		}
-		if (unlikely(PageError(page))) {
-			put_page(page);
-			err = -EIO;
-			goto init_err_out;
-		}
 		/*
 		 * Update the initialized size in the ntfs inode.  This is
 		 * enough to make ntfs_writepage() work.