Do not compile in removed bw compatibility.

src/Benchfib.js

@@ -1,8 +1,6 @@
 define(["amber/boot", "amber_core/Kernel-Objects"], function($boot){"use strict";
-if(!$boot.nilAsReceiver)$boot.nilAsReceiver=$boot.nil;
 if(!("nilAsValue" in $boot))$boot.nilAsValue=$boot.nilAsReceiver;
 var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
-if(!$boot.nilAsClass)$boot.nilAsClass=$boot.dnu;
 $core.addPackage("Benchfib");
 $core.packages["Benchfib"].innerEval = function (expr) { return eval(expr); };
 $core.packages["Benchfib"].transport = {"type":"amd","amdNamespace":"amber/legacy"};

src/Examples.js

@@ -1,8 +1,6 @@
 define(["amber/boot", "amber/web/Web"], function($boot){"use strict";
-if(!$boot.nilAsReceiver)$boot.nilAsReceiver=$boot.nil;
 if(!("nilAsValue" in $boot))$boot.nilAsValue=$boot.nilAsReceiver;
 var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
-if(!$boot.nilAsClass)$boot.nilAsClass=$boot.dnu;
 $core.addPackage("Examples");
 $core.packages["Examples"].innerEval = function (expr) { return eval(expr); };
 $core.packages["Examples"].transport = {"type":"amd","amdNamespace":"amber/legacy"};

src/IDE.js

@@ -7,10 +7,8 @@ define(["amber/boot"
 
 //>>excludeEnd("imports");
 ){"use strict";
-if(!$boot.nilAsReceiver)$boot.nilAsReceiver=$boot.nil;
 if(!("nilAsValue" in $boot))$boot.nilAsValue=$boot.nilAsReceiver;
 var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
-if(!$boot.nilAsClass)$boot.nilAsClass=$boot.dnu;
 $core.addPackage("IDE");
 $core.packages["IDE"].innerEval = function (expr) { return eval(expr); };
 $core.packages["IDE"].imports = ["codemirror/addon/hint/show-hint", "codemirror/lib/codemirror", "codemirror/mode/smalltalk/smalltalk", "css!./resources/amber", "css!codemirror/addon/hint/show-hint", "css!codemirror/lib/codemirror", "css!codemirror/theme/ambiance", "jquery-ui"];