Remove is$Equal method generation

This removes an unused generated method for comparing tokens in two ASTs.

ChangeLog

+2018-06-14  Jesper Öqvist <jesper.oqvist@cs.lth.se>
+
+    * Removed generation of the is$Equal method. The method was unused.
+    It compared tokens in two ASTs.
+
 2018-05-22  Jesper Öqvist <jesper.oqvist@cs.lth.se>
 
     * Fixed an issue causing the cacheCycle option to not work as intended.

src/jastadd/ast/ASTEqual.jrag

-/* Copyright (c) 2013-2015, The JastAdd Team
- * 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 the Lund University 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.
- */
-
-aspect ASTEqual {
-  public void ASTDecl.emitIsEqualMethods(PrintWriter stream) {
-
-    if (hasAbstract() && !isASTNodeDecl()) {
-      // Don't generate isEqual methods for abstract node types.
-      return;
-    }
-
-    TemplateContext tt = templateContext();
-    StringBuilder sb = new StringBuilder();
-    for (Component c : components()) {
-      if (c.isTokenComponent() && !c.isNTA()) {
-        TokenId token = ((TokenComponent)c).getTokenId();
-        String tokenVar = String.format("token%s_%s",
-            ASTNode.convTypeNameToSignature(token.getTYPE()), token.getID());
-        sb.append(String.format(" && (%s == ((%s) node).%s)", tokenVar, name(), tokenVar));
-      }
-    }
-    tt.bind("IsEqualBody", sb.toString());
-    tt.expand("ASTDecl.emitIsEqualMethods", stream);
-  }
-
-  syn lazy boolean Component.isTokenComponent() = false;
-
-  eq TokenComponent.isTokenComponent() = true;
-}

src/jastadd/ast/JaddCodeGen.jrag

@@ -594,7 +594,6 @@ aspect JaddCodeGen {
     emitCloneNode(out);
     emitCopyNode(out);
     emitFullCopy(out);
-    emitIsEqualMethods(out);
 
     if (config().concurrentEval()
         && !isASTNodeDecl()