--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/tree/TreeImpl.java	2020-04-15 18:46:46.000000000 +0530
+++ /dev/null	2020-04-15 18:46:46.000000000 +0530
@@ -1,163 +0,0 @@
-/*
- * Copyright (c) 2016, 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
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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 jdk.nashorn.api.tree;
-
-import jdk.nashorn.internal.ir.Node;
-
-import jdk.nashorn.internal.parser.TokenType;
-
-abstract class TreeImpl implements Tree {
-    protected final Node node;
-
-    TreeImpl(final Node node) {
-        this.node = node;
-    }
-
-    @Override
-    public long getStartPosition() {
-        return node.getStart();
-    }
-
-    @Override
-    public long getEndPosition() {
-        return node.getFinish();
-    }
-
-    @Override
-    public <R,D> R accept(final TreeVisitor<R,D> visitor, final D data) {
-        return visitor.visitUnknown(this, data);
-    }
-
-    static Kind getOperator(final TokenType tt) {
-        switch(tt) {
-            case NEW:
-                return Kind.NEW;
-            case NOT:
-                return Kind.LOGICAL_COMPLEMENT;
-            case NE:
-                return Kind.NOT_EQUAL_TO;
-            case NE_STRICT:
-                return Kind.STRICT_NOT_EQUAL_TO;
-            case MOD:
-                return Kind.REMAINDER;
-            case ASSIGN_MOD:
-                return Kind.REMAINDER_ASSIGNMENT;
-            case BIT_AND:
-                return Kind.AND;
-            case AND:
-                return Kind.CONDITIONAL_AND;
-            case ASSIGN_BIT_AND:
-                return Kind.AND_ASSIGNMENT;
-            case MUL:
-                return Kind.MULTIPLY;
-            case ASSIGN_MUL:
-                return Kind.MULTIPLY_ASSIGNMENT;
-            case POS:
-                return Kind.UNARY_PLUS;
-            case ADD:
-                return Kind.PLUS;
-            case INCPREFIX:
-                return Kind.PREFIX_INCREMENT;
-            case INCPOSTFIX:
-                return Kind.POSTFIX_INCREMENT;
-            case ASSIGN_ADD:
-                return Kind.PLUS_ASSIGNMENT;
-            case NEG:
-                return Kind.UNARY_MINUS;
-            case SUB:
-                return Kind.MINUS;
-            case DECPREFIX:
-                return Kind.PREFIX_DECREMENT;
-            case DECPOSTFIX:
-                return Kind.POSTFIX_DECREMENT;
-            case ASSIGN_SUB:
-                return Kind.MINUS_ASSIGNMENT;
-            case DIV:
-                return Kind.DIVIDE;
-            case ASSIGN_DIV:
-                return Kind.DIVIDE_ASSIGNMENT;
-            case LT:
-                return Kind.LESS_THAN;
-            case SHL:
-                return Kind.LEFT_SHIFT;
-            case ASSIGN_SHL:
-                return Kind.LEFT_SHIFT_ASSIGNMENT;
-            case LE:
-                return Kind.LESS_THAN_EQUAL;
-            case ASSIGN:
-                return Kind.ASSIGNMENT;
-            case EQ:
-                return Kind.EQUAL_TO;
-            case EQ_STRICT:
-                return Kind.STRICT_EQUAL_TO;
-            case GT:
-                return Kind.GREATER_THAN;
-            case GE:
-                return Kind.GREATER_THAN_EQUAL;
-            case SAR:
-                return Kind.RIGHT_SHIFT;
-            case ASSIGN_SAR:
-                return Kind.RIGHT_SHIFT_ASSIGNMENT;
-            case SHR:
-                return Kind.UNSIGNED_RIGHT_SHIFT;
-            case ASSIGN_SHR:
-                return Kind.UNSIGNED_RIGHT_SHIFT_ASSIGNMENT;
-            case TERNARY:
-                return Kind.CONDITIONAL_EXPRESSION;
-            case BIT_XOR:
-                return Kind.XOR;
-            case ASSIGN_BIT_XOR:
-                return Kind.XOR_ASSIGNMENT;
-            case BIT_OR:
-                return Kind.OR;
-            case ASSIGN_BIT_OR:
-                return Kind.OR_ASSIGNMENT;
-            case OR:
-                return Kind.CONDITIONAL_OR;
-            case BIT_NOT:
-                return Kind.BITWISE_COMPLEMENT;
-            case DELETE:
-                return Kind.DELETE;
-            case SPREAD_ARRAY:
-            case SPREAD_ARGUMENT:
-                return Kind.SPREAD;
-            case TYPEOF:
-                return Kind.TYPEOF;
-            case VOID:
-                return Kind.VOID;
-            case YIELD:
-                return Kind.YIELD;
-            case IN:
-                return Kind.IN;
-            case INSTANCEOF:
-                return Kind.INSTANCE_OF;
-            case COMMARIGHT:
-                return Kind.COMMA;
-            default:
-                throw new AssertionError("should not reach here: " + tt);
-        }
-    }
-}