--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/gc/shared/BarrierSet.java	Wed Jun 26 14:28:47 2019 +0530
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,56 +0,0 @@
-/*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2019, Red Hat Inc. 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
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-
-package org.graalvm.compiler.hotspot.gc.shared;
-
-import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
-import org.graalvm.compiler.nodes.StructuredGraph;
-import org.graalvm.compiler.nodes.extended.ArrayRangeWrite;
-import org.graalvm.compiler.nodes.java.AbstractCompareAndSwapNode;
-import org.graalvm.compiler.nodes.java.LoweredAtomicReadAndWriteNode;
-import org.graalvm.compiler.nodes.memory.ReadNode;
-import org.graalvm.compiler.nodes.memory.WriteNode;
-
-public abstract class BarrierSet {
-    private final GraalHotSpotVMConfig vmConfig;
-
-    protected BarrierSet(GraalHotSpotVMConfig vmConfig) {
-        this.vmConfig = vmConfig;
-    }
-
-    public final GraalHotSpotVMConfig getVMConfig() {
-        return vmConfig;
-    }
-
-    public abstract void addReadNodeBarriers(ReadNode node, StructuredGraph graph);
-
-    public abstract void addWriteNodeBarriers(WriteNode node, StructuredGraph graph);
-
-    public abstract void addAtomicReadWriteNodeBarriers(LoweredAtomicReadAndWriteNode node, StructuredGraph graph);
-
-    public abstract void addCASBarriers(AbstractCompareAndSwapNode node, StructuredGraph graph);
-
-    public abstract void addArrayRangeBarriers(ArrayRangeWrite write, StructuredGraph graph);
-}