Revert "fixed #91" -- the fix was for an unconfirmed bug

This reverts commit 9155724082.
See #38 for further action

lib/cartodb/server_options.js

@@ -424,9 +424,6 @@ module.exports = function(){
         // bring all query values onto req.params object
         _.extend(req.params, req.query);
 
-        // use both api_key and map_key to auth
-        req.params.map_key = req.params.map_key || req.params.api_key;
-
         // for cartodb, ensure interactivity is cartodb_id or user specified
         req.params.interactivity = req.params.interactivity || 'cartodb_id';
 

test/unit/cartodb/req2params.test.js

@@ -77,7 +77,6 @@ suite('req2params', function() {
           assert.equal(qo.cache_buster, query.cache_buster)
           assert.equal('test', query.api_key)
           assert.equal(undefined, query.non_included)
-          assert.equal(query.map_key, 'test')
           done();
         });
       });