fix(core): remove extra angular-i18n imports

Author: antleblanc

packages/manager/modules/core/src/index.js

@@ -80,28 +80,15 @@ angular
 
     let angularLocalePromise;
     switch (angularLocale) {
-      case 'cs-cz':
-        angularLocalePromise = import('angular-i18n/angular-locale_cs-cz.js');
-        break;
       case 'de-de':
         angularLocalePromise = import('angular-i18n/angular-locale_de-de.js');
         break;
       case 'en-gb':
-      case 'en-asia':
         angularLocalePromise = import('angular-i18n/angular-locale_en-gb.js');
         break;
-      case 'en-ca':
-        angularLocalePromise = import('angular-i18n/angular-locale_en-ca.js');
-        break;
       case 'en-us':
         angularLocalePromise = import('angular-i18n/angular-locale_en-us.js');
         break;
-      case 'en-au':
-        angularLocalePromise = import('angular-i18n/angular-locale_en-au.js');
-        break;
-      case 'en-sg':
-        angularLocalePromise = import('angular-i18n/angular-locale_en-sg.js');
-        break;
       case 'es-es':
         angularLocalePromise = import('angular-i18n/angular-locale_es-es.js');
         break;