Limit pre-ember versions to make build run within time

Author: kategengler

prember-urls.js

@@ -41,17 +41,7 @@ module.exports = function () {
       urls.push(`/${p}/${uniqVersion}/${suffix}`);
     };
 
-    const oldVersions = [
-      '1.13',
-      '2.18',
-      '3.28',
-      '4.4',
-      '4.8',
-      '4.12',
-      '5.4',
-      '5.8',
-      '5.12',
-    ];
+    const oldVersions = ['1.13', '2.18', '3.28', '4.12', '5.12'];
 
     uniqueProjectVersions.forEach((uniqVersion) => {
       if (