Remove references to some missing files and fix some invalid JavaScri…

…pt (#292)

1. Remove references to `js/vendor`, which was removed in
#17
2. Remove reference to `css.theme.map`, which we never distribute since
we never minify `css.theme` to begin with
3. Remove invalid JavaScript references to `pytorch-shortcuts-wrapper`
and `header-holder`, which no longer exist in our HTML template and
caused the JavaScript to fail to run.

The main console error I still get is tracked by
#291. (FYI: to avoid
a bunch of console errors when developing, you need to serve the app
with e.g. `python3 -m http.server`, rather than opening `index.html`
directly.)

As a result of this change, the right page table of contents now shows
subheadings! You can click the + or - to expand it.

![Screenshot 2023-05-04 at 1 02 48
PM](https://user-images.githubusercontent.com/14852634/236303682-915ac4de-e500-4525-849a-062245e91762.png)

qiskit_sphinx_theme/pytorch_base/layout.html

@@ -161,14 +161,10 @@
       {{ js_tag(scriptfile) }}
     {%- endfor %}
 
-    <script type="text/javascript" src="{{ pathto('_static/js/vendor/popper.min.js', 1) }}"></script>
-    <script type="text/javascript" src="{{ pathto('_static/js/vendor/bootstrap.min.js', 1) }}"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/list.js/1.5.0/list.min.js"></script>
     <script type="text/javascript" src="{{ pathto('_static/js/theme.js', 1) }}"></script>
     <script type="text/javascript" src="{{ pathto('_static/js/utils.js', 1) }}"></script>
 
-  <script type="text/javascript" src="{{ pathto('_static/js/vendor/anchor.min.js', 1) }}"></script>
-
   <!-- enable language dropdown menu expand -->
   <script type="text/javascript">
     jQuery(function () {

qiskit_sphinx_theme/pytorch_base/static/css/theme.css

@@ -12757,4 +12757,3 @@ article.pytorch-article .tutorials-callout-container .btn.callout-button a {
   text-transform: uppercase;
   padding-right: 5px;
 }
-/*# sourceMappingURL=theme.css.map */

qiskit_sphinx_theme/pytorch_base/static/js/theme.js

@@ -87,12 +87,7 @@ window.utilities = {
   },
 
   headersHeight: function() {
-    if (document.getElementById("pytorch-left-menu").classList.contains("make-fixed")) {
-      return document.getElementById("pytorch-page-level-bar").offsetHeight;
-    } else {
-      return document.getElementById("header-holder").offsetHeight +
-             document.getElementById("pytorch-page-level-bar").offsetHeight;
-    }
+    return document.getElementById("pytorch-page-level-bar").offsetHeight;
   },
 
   windowHeight: function() {
@@ -240,8 +235,7 @@ window.highlightNavigation = {
 
     var scrollPosition = utilities.scrollTop();
     var OFFSET_TOP_PADDING = 25;
-    var offset = document.getElementById("header-holder").offsetHeight +
-                 document.getElementById("pytorch-page-level-bar").offsetHeight +
+    var offset = document.getElementById("pytorch-page-level-bar").offsetHeight +
                  OFFSET_TOP_PADDING;
 
     var sections = highlightNavigation.sections;
@@ -484,9 +478,6 @@ window.sideMenus = {
     }
 
     if (rightMenuHasLinks) {
-      // Don't show the Shortcuts menu title text unless there are menu items
-      document.getElementById("pytorch-shortcuts-wrapper").style.display = "block";
-
       // We are hiding the titles of the pages in the right side menu but there are a few
       // pages that include other pages in the right side menu (see 'torch.nn' in the docs)
       // so if we exclude those it looks confusing. Here we add a 'title-link' class to these
@@ -577,16 +568,8 @@ window.sideMenus = {
   },
 
   handleNavBar: function() {
-    var mainHeaderHeight = document.getElementById('header-holder').offsetHeight;
-
-    // If we are scrolled past the main navigation header fix the sub menu bar to top of page
-    if (utilities.scrollTop() >= mainHeaderHeight) {
-      document.getElementById("pytorch-left-menu").classList.add("make-fixed");
-      document.getElementById("pytorch-page-level-bar").classList.add("left-menu-is-fixed");
-    } else {
-      document.getElementById("pytorch-left-menu").classList.remove("make-fixed");
-      document.getElementById("pytorch-page-level-bar").classList.remove("left-menu-is-fixed");
-    }
+    document.getElementById("pytorch-left-menu").classList.remove("make-fixed");
+    document.getElementById("pytorch-page-level-bar").classList.remove("left-menu-is-fixed");
   },
 
   expandClosestUnexpandedParentList: function (el) {