Get rid of import of nsk.share.MainWrapper. It is no longer referenced.

Reviewed-by: lmesnik

Author: plummercj

test/hotspot/jtreg/vmTestbase/nsk/share/jdi/JDIBase.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2022, 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
@@ -41,7 +41,6 @@
 import com.sun.jdi.request.EventRequestManager;
 import java.util.List;
 import nsk.share.Log;
-import nsk.share.MainWrapper;
 
 public class JDIBase {