smb: client: remove redundant pointer 'server'

The pointer 'server' is assigned but never read, the pointer is
redundant and can be removed. Cleans up clang scan build warning:

fs/smb/client/dfs.c:217:3: warning: Value stored to 'server' is
never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Steve French <[e-mail]>

fs/smb/client/dfs.c

···
 	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
 	char *ref_path = NULL, *full_path = NULL;
 	struct dfs_cache_tgt_iterator *tit;
-	struct TCP_Server_Info *server;
 	struct cifs_tcon *tcon;
 	char *origin_fullpath = NULL;
 	char sep = CIFS_DIR_SEP(cifs_sb);
···
 	} while (rc == -EREMOTE);
 
 	if (!rc) {
-		server = mnt_ctx->server;
 		tcon = mnt_ctx->tcon;
 
 		spin_lock(&tcon->tc_lock);