Ignore HtmlReporter's createElement and createTextNode options

Injected DOM wrappers were a nice idea in theory but everyone just passes
wrappers around document.createElement/document.createTextNode. That
includes HtmlReporter's unit tests and karma-jasmine-html-reporter, the
only known 5.x-compatible library that constructs an HtmlReporter.

src/boot/boot1.js

@@ -64,12 +64,6 @@
     getContainer: function() {
       return document.body;
     },
-    createElement: function() {
-      return document.createElement.apply(document, arguments);
-    },
-    createTextNode: function() {
-      return document.createTextNode.apply(document, arguments);
-    },
     timer: new jasmine.Timer(),
     filterSpecs: filterSpecs
   });