chore(internal): remove unused code

Author: bmuenzenmeyer

packages/core/src/lib/buildPatterns.js

@@ -20,10 +20,7 @@ const render = require('./render');
 const Pattern = require('./object_factory').Pattern;
 
 let fs = require('fs-extra'); // eslint-disable-line
-let ui_builder = require('./ui_builder'); // eslint-disable-line
-let copier = require('./copier'); // eslint-disable-line
 let pattern_exporter = new pe(); // eslint-disable-line
-let serve = require('./serve'); // eslint-disable-line
 
 const lineage_hunter = new lh();