Remove window|undefined from exception regexp

Author: VasylMarchuk

lib/rules/no-array-prototype-extensions.js

@@ -94,7 +94,7 @@ const KNOWN_NON_ARRAY_FUNCTION_CALLS = new Set([
  */
 const KNOWN_NON_ARRAY_FUNCTION_CALLS_REGEXP = new Set([
   // ember-cli-mirage
-  /(window|undefined)\.server\.schema\.(.*)\.findBy\(\)/,
+  /\.server\.schema\.(.*)\.findBy\(\)/,
 ]);
 
 /**