Remove unused file and bundle ie-emulation-modes-warning.js with docs.min.js (#24825)

* Remove the unused assets/js/ie10-viewport-bug-workaround.js.

* Combine ie-emulation-modes-warning.js with docs.min.js.

assets/js/ie10-viewport-bug-workaround.js

@@ -1,24 +0,0 @@
-/*!
- * IE10 viewport hack for Surface/desktop Windows 8 bug
- * Copyright 2014-2017 The Bootstrap Authors
- * Copyright 2014-2017 Twitter, Inc.
- * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
- */
-
-// See the Getting Started docs for more information:
-// https://getbootstrap.com/getting-started/#support-ie10-width
-
-(function () {
-  'use strict'
-
-  if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
-    var msViewportStyle = document.createElement('style')
-    msViewportStyle.appendChild(
-      document.createTextNode(
-        '@-ms-viewport{width:auto!important}'
-      )
-    )
-    document.head.appendChild(msViewportStyle)
-  }
-
-}())

assets/js/src/ie-emulation-modes-warning.js

@@ -1,13 +1,7 @@
 // NOTICE!! DO NOT USE ANY OF THIS JAVASCRIPT
 // IT'S JUST JUNK FOR OUR DOCS!
 // ++++++++++++++++++++++++++++++++++++++++++
-/*!
- * Copyright 2014-2015 The Bootstrap Authors
- * Copyright 2014-2015 Twitter, Inc.
- *
- * Licensed under the Creative Commons Attribution 3.0 Unported License. For
- * details, see https://creativecommons.org/licenses/by/3.0/.
- */
+
 // Intended to prevent false-positive bug reports about Bootstrap not working properly in old versions of IE due to folks testing using IE's unreliable emulation modes.
 (function () {
   'use strict'