refactor: Move script parts around

- Run setup function in global script
- Move common script assets to hippie main template
- Remove unused scrcipt from components page

source/screens/demo/introduction.njk

@@ -32,11 +32,6 @@ tags:
 
 {% block script %}
   {{ super() }}
-  {# <script src="{{ pageBase }}js/{{hippie.jsFile}}.min.js" type="text/javascript"></script> #}
-  <!-- build:js js/main.concat.min.js -->
-  <script src="{{ pageBase }}js/variables.js"></script>
-  <script src="{{ pageBase }}js/functions.js"></script>
-  <script src="{{ pageBase }}js/global.js"></script>
   <script>
     assetsLoaded = true;
     logPerf('Assets loaded.', assetsLoaded);