remove unused middleware

lib/cartodb/middleware/context/parse-token-param.js

@@ -1,47 +0,0 @@
-module.exports = function parseTokenParamMiddleware () {
-    return function parseTokenParam (req, res, next) {
-        // jshint maxcomplexity:7
-        if (!req.params.token) {
-            return next();
-        }
-
-        var user = req.context.user;
-
-        // Token might match the following patterns:
-        // - {user}@{tpl_id}@{token}:{cache_buster}
-        var tksplit = req.params.token.split(':');
-
-        req.params.token = tksplit[0];
-
-        if ( tksplit.length > 1 ) {
-            req.params.cache_buster= tksplit[1];
-        }
-
-        tksplit = req.params.token.split('@');
-
-        if ( tksplit.length > 1 ) {
-            req.params.signer = tksplit.shift();
-
-            if ( ! req.params.signer ) {
-                req.params.signer = user;
-            } else if ( req.params.signer !== user ) {
-                var err = new Error(
-                    `Cannot use map signature of user "${req.params.signer}" on db of user "${user}"`
-                );
-                err.http_status = 403;
-                req.profiler.done('req2params');
-
-                return next(err);
-            }
-
-            // skip template hash
-            if (tksplit.length > 1) {
-                tksplit.shift();
-            }
-
-            req.params.token = tksplit.shift();
-        }
-
-        next();
-    };
-};