Further cleanup

_config/config.yml

@@ -4,6 +4,7 @@ After:
   - 'framework/*'
   - 'cms/*'
 ---
+
 SiteConfig:
   extensions:
    - FASettings

code/extensions/FAInjector.php

@@ -5,7 +5,7 @@
  */
 class FAInjector extends Extension
 {
-    public function onBeforeInit()
+    public function onAfterInit()
     {
         if (SiteConfig::current_site_config()->UseThemeCSS) {
             return;

code/extensions/FASettings.php

@@ -10,11 +10,6 @@ class FASettings extends DataExtension
         'UseThemeCSS' => 'boolean(1)',
     );
 
-    private static $defaults = array(
-        'UseCDN'      => false,
-        'UseThemeCSS' => false,
-    );
-
     public function updateCMSFields(FieldList $fields)
     {
         $fields->addFieldsToTab('Root.FontAwesome', array(