--- old/src/sample/nashorn/findvardelete.js	2020-04-15 18:53:46.000000000 +0530
+++ /dev/null	2020-04-15 18:53:46.000000000 +0530
@@ -1,97 +0,0 @@
-/*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   - Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *
- *   - Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- *   - Neither the name of Oracle nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-// delete of scope vars is reported as error in strict mode.
-// This script finds scripts that such deletes. Scripts in
-// the specified directory are scanned. If no directory is 
-// specified, the current directory is scanned.
-
-if (arguments.length == 0) {
-    arguments[0] = ".";
-}
-
-var File = Java.type("java.io.File");
-var file = new File(arguments[0]);
-if (!file.exists()) {
-    print(arguments[0] + " is neither a directory nor a file");
-    exit(1);
-}
-
-var Files = Java.type("java.nio.file.Files");
-var IdentifierTree = Java.type("jdk.nashorn.api.tree.IdentifierTree");
-var Parser = Java.type("jdk.nashorn.api.tree.Parser");
-var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");
-var Tree = Java.type("jdk.nashorn.api.tree.Tree");
-
-var parser = Parser.create("-scripting", "--const-as-var");
-
-function checkFile(file) {
-    // print("checking " + file);
-    var ast = parser.parse(file, print);
-    if (!ast) {
-        return;
-    }
-
-    // locate __proto__ usage and warn
-    ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) {
-        lineMap: null,
-
-        printWarning: function(node, varName) {
-            var pos = node.startPosition;
-            var line = this.lineMap.getLineNumber(pos);
-            var column = this.lineMap.getColumnNumber(pos);
-            print("WARNING: delete " + varName + " in " + file + " @ " + line + ":" + column);
-        },
-
-        visitCompilationUnit: function(node, extra) {
-            this.lineMap = node.lineMap;
-            Java.super(visitor).visitCompilationUnit(node, extra);
-        },
-
-        visitUnary: function(node, extra) {
-            if (node.kind == Tree.Kind.DELETE &&
-                node.expression instanceof IdentifierTree) {
-                this.printWarning(node, node.expression.name);
-            } 
-            Java.super(visitor).visitUnary(node, extra);
-        },
-
-    }, null);
-}
-
-if (file.isDirectory()) {
-    Files.walk(file.toPath())
-        .filter(function(p) Files.isRegularFile(p))
-        .filter(function(p) p.toFile().name.endsWith('.js'))
-        .forEach(checkFile);
-} else {
-    checkFile(file);
-}