[cleanup] Remove duplicated code

src/jastadd/ast/Comments.jrag

@@ -142,7 +142,7 @@ outer: while (true) {
    * @param obj original class body object
    * @return generated javadoc comment
    */
-  public String ASTDecl.docComment(ClassBodyObject obj) {
+  public String TypeDecl.docComment(ClassBodyObject obj) {
     JavaDocParser parser = new JavaDocParser();
     TemplateContext tt = templateContext();
     tt.bind("SourceComment", parser.parse(obj.comments));

src/jastadd/ast/JastAddCodeGen.jadd

@@ -298,15 +298,7 @@ aspect JastAddCodeGen {
       ByteArrayOutputStream bos = new ByteArrayOutputStream();
       PrintStream stream = new PrintStream(bos, true, "UTF-8");
       stream.println(typeDeclarationString());
-      StringBuffer buf = new StringBuffer();
-      for (ClassBodyObject obj : classBodyDecls) {
-        org.jastadd.jrag.AST.SimpleNode n = obj.node;
-        buf.append(config().indent);
-        buf.append(obj.modifiers());
-        n.jjtAccept(new ClassBodyDeclUnparser(), buf);
-        buf.append("\n\n");
-      }
-      stream.println(buf.toString());
+      emitMembers(stream);
       emitAbstractSyns(stream);
       emitInhDeclarations(stream);
       stream.close();

src/jastadd/ast/JragCodeGen.jrag

@@ -289,9 +289,7 @@ aspect JragCodeGen {
     }
   }
 
-  public void TypeDecl.emitMembers(PrintStream out) { }
-
-  public void ASTDecl.emitMembers(PrintStream out) {
+  public void TypeDecl.emitMembers(PrintStream out) {
     for (ClassBodyObject obj : classBodyDecls) {
       org.jastadd.jrag.AST.SimpleNode node = obj.node;
       out.print(obj.modifiers());