Remove //tools/idl_parser.

tools/idl_parser/test_parser/implements_web.idl

-/* Copyright (c) 2013 The Chromium Authors. All rights reserved.
-   Use of this source code is governed by a BSD-style license that can be
-  found in the LICENSE file. */
-
-/* Test Implements productions
-
-Run with --test to generate an AST and verify that all comments accurately
-reflect the state of the Nodes.
-
-BUILD Type(Name)
-This comment signals that a node of type <Type> is created with the
-name <Name>.
-
-ERROR Error String
-This comment signals that a error of <Error String> is generated.  The error
-is not assigned to a node, but are expected in order.
-
-PROP Key=Value
-This comment signals that a property has been set on the Node such that
-<Key> = <Value>.
-
-TREE
-Type(Name)
-  Type(Name)
-  Type(Name)
-    Type(Name)
-    ...
-This comment signals that a tree of nodes matching the BUILD comment
-symatics should exist.  This is an exact match.
-*/
-
-/* BUILD Implements(A) */
-/* PROP REFERENCE=B */
-A implements B;
-
-/* ERROR Unexpected ";" after keyword "implements". */
-A implements;
-
-/* BUILD Implements(B) */
-/* PROP REFERENCE=C */
-B implements C;
-
-/* ERROR Unexpected keyword "implements" after "]". */
-[foo] implements B;
-
-/* BUILD Implements(D) */
-/* PROP REFERENCE=E */
-D implements E;
-
-/* ERROR Unexpected keyword "implements" after comment. */
-implements C;
-