Remove no longer needed exports for Premium plugin

[MAILPOET-2382]

webpack.config.js

@@ -121,13 +121,6 @@ const baseConfig = {
           'babel-loader'
         ],
       },
-      {
-        test: /form.jsx/i,
-        use: [
-          'expose-loader?' + globalPrefix + '.Form',
-          'babel-loader'
-        ]
-      },
       {
         include: path.resolve(__dirname, 'assets/js/src/newsletters/badges/stats.jsx'),
         use: [
@@ -211,7 +204,6 @@ const adminConfig = {
       'prop-types',
       'classnames',
       'help-tooltip.jsx',
-      'form/form.jsx',
       'listing/listing.jsx',
       'newsletters/badges/stats.jsx',
       'common/check_spf_record.jsx',