cifs: remove set but not used variable 'server'

Fixes gcc '-Wunused-but-set-variable' warning:

fs/cifs/smb2pdu.c: In function 'smb311_posix_mkdir':
fs/cifs/smb2pdu.c:2040:26: warning:
 variable 'server' set but not used [-Wunused-but-set-variable]

fs/cifs/smb2pdu.c: In function 'build_qfs_info_req':
fs/cifs/smb2pdu.c:4067:26: warning:
 variable 'server' set but not used [-Wunused-but-set-variable]

The first 'server' never used since commit bea851b8 ("smb3: Fix mode on
mkdir on smb311 mounts")
And the second not used since commit 1fc6ad2f ("cifs: remove
header_preamble_size where it is always 0")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smb2pdu.c

@@ -1955,7 +1955,6 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
 	struct smb_rqst rqst;
 	struct smb2_create_req *req;
 	struct smb2_create_rsp *rsp = NULL;
-	struct TCP_Server_Info *server;
 	struct cifs_ses *ses = tcon->ses;
 	struct kvec iov[3]; /* make sure at least one for each open context */
 	struct kvec rsp_iov = {NULL, 0};
@@ -1978,9 +1977,7 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
 	if (!utf16_path)
 		return -ENOMEM;
 
-	if (ses && (ses->server))
-		server = ses->server;
-	else {
+	if (!ses || !(ses->server)) {
 		rc = -EIO;
 		goto err_free_path;
 	}
@@ -3982,7 +3979,6 @@ static int
 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
 		   int outbuf_len, u64 persistent_fid, u64 volatile_fid)
 {
-	struct TCP_Server_Info *server;
 	int rc;
 	struct smb2_query_info_req *req;
 	unsigned int total_len;
@@ -3992,8 +3988,6 @@ build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
 	if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
 		return -EIO;
 
-	server = tcon->ses->server;
-
 	rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
 			     &total_len);
 	if (rc)