remove more mentions of theme

docs/assets/css/src/docs.css

@@ -599,8 +599,7 @@ body {
 }
 
 /* Back to top (hidden on mobile) */
-.back-to-top,
-.bs-docs-theme-toggle {
+.back-to-top {
   display: none;
   padding: 4px 10px;
   margin-top: 10px;
@@ -609,18 +608,13 @@ body {
   font-weight: 500;
   color: #999;
 }
-.back-to-top:hover,
-.bs-docs-theme-toggle:hover {
+.back-to-top:hover {
   color: #563d7c;
   text-decoration: none;
 }
-.bs-docs-theme-toggle {
-  margin-top: 0;
-}
 
 @media (min-width: 768px) {
-  .back-to-top,
-  .bs-docs-theme-toggle {
+  .back-to-top {
     display: block;
   }
 }

docs/assets/js/src/customizer.js

@@ -293,13 +293,11 @@ window.onload = function () { // wait for load in a dumb way because B-0
       })
 
     var bsLessSource    = preamble + generateLESS('bootstrap.less', lessFileIncludes, vars)
-    var themeLessSource = preamble + generateLESS('theme.less',     lessFileIncludes, vars)
 
     var prefixer = autoprefixer({ browsers: __configBridge.autoprefixerBrowsers })
 
     $.when(
       compileLESS(bsLessSource, 'bootstrap', result),
-      compileLESS(themeLessSource, 'bootstrap-theme', result)
     ).done(function () {
       for (var key in result) {
         result[key] = prefixer.process(result[key]).css

docs/getting-started/contents.md

@@ -26,7 +26,7 @@ bootstrap/
     └── bootstrap.min.js
 {% endhighlight %}
 
-This is the most basic form of Bootstrap: precompiled files for quick drop-in usage in nearly any web project. We provide compiled CSS and JS (`bootstrap.*`), as well as compiled and minified CSS and JS (1bootstrap.min.*1). Also included is the optional Bootstrap theme.
+This is the most basic form of Bootstrap: precompiled files for quick drop-in usage in nearly any web project. We provide compiled CSS and JS (`bootstrap.*`), as well as compiled and minified CSS and JS (1bootstrap.min.*1).
 
 ### Bootstrap source code