Revert "Have DiscussionXBlock take care of loading assets it depends on"

common/static/common/js/discussion/mathjax_include.js

@@ -1,36 +0,0 @@
-var vendorScript;
-if (typeof MathJax === 'undefined') {
-    vendorScript = document.createElement('script');
-    vendorScript.onload = function() {
-        'use strict';
-        var MathJax = window.MathJax,
-            setMathJaxDisplayDivSettings;
-        MathJax.Hub.Config({
-            tex2jax: {
-                inlineMath: [
-                    ['\\(', '\\)'],
-                    ['[mathjaxinline]', '[/mathjaxinline]']
-                ],
-                displayMath: [
-                    ['\\[', '\\]'],
-                    ['[mathjax]', '[/mathjax]']
-                ]
-            }
-        });
-        MathJax.Hub.signal.Interest(function(message) {
-            if (message[0] === 'End Math') {
-                setMathJaxDisplayDivSettings();
-            }
-        });
-        setMathJaxDisplayDivSettings = function() {
-            $('.MathJax_Display').each(function() {
-                this.setAttribute('tabindex', '0');
-                this.setAttribute('aria-live', 'off');
-                this.removeAttribute('role');
-                this.removeAttribute('aria-readonly');
-            });
-        };
-    };
-    vendorScript.src = 'https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG';
-    document.body.appendChild(vendorScript);
-}

common/static/common/js/spec/discussion/view/discussion_thread_profile_view_spec.js

@@ -18,6 +18,12 @@
                 created_at: '2014-09-09T20:11:08Z'
             };
             this.imageTag = '<img src="https://www.google.com.pk/images/srpr/logo11w.png">';
+            window.MathJax = {
+                Hub: {
+                    Queue: function() {
+                    }
+                }
+            };
         });
         makeView = function(thread) {
             var view;