ext4: remove unneeded check of nr_to_submit

cppcheck reports
fs/ext4/page-io.c:516:51: style:
  Condition 'nr_to_submit' is always true [knownConditionTrueFalse]
 if (fscrypt_inode_uses_fs_layer_crypto(inode) && nr_to_submit) {
                                                  ^
This earlier check to bail, makes this check unncessary
	/* Nothing to submit? Just unlock the page... */
	if (!nr_to_submit)
		return 0;

Signed-off-by: Tom Rix <[email protected]>
Fixes: dff4ac7 ("ext4: move keep_towrite handling to ext4_bio_write_page()")
Reviewed-by: Eric Biggers <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

Author: Tom Rix

fs/ext4/page-io.c

@@ -510,7 +510,7 @@ int ext4_bio_write_folio(struct ext4_io_submit *io, struct folio *folio,
 	 * (e.g. holes) to be unnecessarily encrypted, but this is rare and
 	 * can't happen in the common case of blocksize == PAGE_SIZE.
 	 */
-	if (fscrypt_inode_uses_fs_layer_crypto(inode) && nr_to_submit) {
+	if (fscrypt_inode_uses_fs_layer_crypto(inode)) {
 		gfp_t gfp_flags = GFP_NOFS;
 		unsigned int enc_bytes = round_up(len, i_blocksize(inode));
 		struct page *bounce_page;