chore(gulp): Stop copying .cjs files to the dist folder

They're already transpiled by the build/transpile.js.cjs task

Author: vicb

gulpfile.js

@@ -157,10 +157,9 @@ var CONFIG = {
  cjs: {
  src: [
  'modules/**/*.md', '!modules/**/*.dart.md', 'modules/**/*.png',
- 'modules/**/*.cjs', 'modules/**/package.json'
+ 'modules/**/package.json'
  ],
  pipes: {
- '**/*.cjs': gulpPlugins.rename({extname: '.js'}),
  '**/*.js.md': gulpPlugins.rename(function(file) {
  file.basename = file.basename.substring(0, file.basename.lastIndexOf('.'));
  }),