8359168: Revert stdin.encoding usage in test/hotspot/jtreg/vmTestbase/nsk/jvmti/AttachOnDemand/attach010/attach010Agent00.java

Reviewed-by: cjplummer

Author: Volkan Yazici

test/hotspot/jtreg/vmTestbase/nsk/jvmti/AttachOnDemand/attach010/attach010Agent00.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -60,8 +60,7 @@ protected void agentActions() throws Throwable {
         FileInputStream newInputStream = new FileInputStream(inStreamFileName);
         System.setIn(newInputStream);
 
-        BufferedReader inputStreamReader = new BufferedReader(new InputStreamReader(
-                System.in, System.getProperty("stdin.encoding")));
+        BufferedReader inputStreamReader = new BufferedReader(new InputStreamReader(System.in));
         int readValue = Integer.parseInt(inputStreamReader.readLine());
 
         if (readValue != valueToWrite) {