cifs: remove redundant initialization of variable rc

The variable rc is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/cifssmb.c

@@ -2375,7 +2375,7 @@ int
 CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
 	      unsigned int *nbytes, struct kvec *iov, int n_vec)
 {
-	int rc = -EACCES;
+	int rc;
 	WRITE_REQ *pSMB = NULL;
 	int wct;
 	int smb_hdr_len;