Strip dead code from javascript compiler

lib/handlebars/compiler/javascript-compiler.js

@@ -403,9 +403,6 @@ JavaScriptCompiler.prototype = {
     } else {
       this.pushStackLiteral('this.data(data, ' + depth + ')');
     }
-    if (!parts) {
-      return;
-    }
 
     var len = parts.length;
     for (var i = 0; i < len; i++) {
@@ -702,10 +699,6 @@ JavaScriptCompiler.prototype = {
   },
 
   programExpression: function(guid) {
-    if(guid == null) {
-      return 'this.noop';
-    }
-
     var child = this.environment.children[guid],
         depths = child.depths.list,
         useDepths = this.useDepths,
@@ -854,11 +847,11 @@ JavaScriptCompiler.prototype = {
     }
   },
 
-  topStack: function(wrapped) {
+  topStack: function() {
     var stack = (this.isInline() ? this.inlineStack : this.compileStack),
         item = stack[stack.length - 1];
 
-    if (!wrapped && (item instanceof Literal)) {
+    if (item instanceof Literal) {
       return item.value;
     } else {
       return item;