Unnecesary code

[pabloalmunia]

When we define de plugin with this configuration:

new ClosurePlugin ({mode : 'AGGRESSIVE_BUNDLE'},
                         {languageOut : 'ECMASCRIPT_2018'})

this unnecesary code is included on top of compiled source:

(function(__wpcc){'use strict';var a;"undefined"===typeof a&&(a=function(){});a.p="";}).call(this || window, (window.__wpcc = window.__wpcc || {}));

When the polifills aren't necesary, this code can be removed.

[anandkumarram]

Yeah facing the same issue