cifs: Remove useless variable

Fix the following gcc warning:

fs/cifs/cifsacl.c:1097:8: warning: variable ‘nmode’ set but not used
[-Wunused-but-set-variable].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/cifsacl.c

@@ -1094,11 +1094,9 @@ static int set_chmod_dacl(struct cifs_acl *pdacl, struct cifs_acl *pndacl,
 	struct cifs_ace *pnntace = NULL;
 	char *nacl_base = NULL;
 	u32 num_aces = 0;
-	__u64 nmode;
 	bool new_aces_set = false;
 
 	/* Assuming that pndacl and pnmode are never NULL */
-	nmode = *pnmode;
 	nacl_base = (char *)pndacl;
 	nsize = sizeof(struct cifs_acl);