Remove the now unneeded polyfills.

js/tests/karma.conf.js

@@ -137,16 +137,6 @@ if (browserStack) {
         branches: 89,
         functions: 90,
         lines: 90
-      },
-      each: {
-        overrides: {
-          'js/src/dom/polyfill.js': {
-            statements: 30,
-            lines: 30,
-            branches: 8,
-            functions: 30
-          }
-        }
       }
     }
   }

js/tests/visual/alert.html

@@ -51,7 +51,6 @@
       </div>
     </div>
 
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/data.js"></script>

js/tests/visual/button.html

@@ -44,7 +44,6 @@
       </div>
     </div>
 
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/data.js"></script>

js/tests/visual/carousel.html

@@ -45,7 +45,6 @@
       </div>
     </div>
 
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/manipulator.js"></script>

js/tests/visual/collapse.html

@@ -71,7 +71,6 @@
       </div>
     </div>
 
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/manipulator.js"></script>

js/tests/visual/dropdown.html

@@ -210,7 +210,6 @@
     </div>
 
     <script src="../../../node_modules/popper.js/dist/umd/popper.min.js"></script>
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/data.js"></script>

js/tests/visual/modal.html

@@ -206,7 +206,6 @@
     </div>
 
     <script src="../../../node_modules/popper.js/dist/umd/popper.min.js"></script>
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/data.js"></script>

js/tests/visual/popover.html

@@ -32,7 +32,6 @@
     </div>
 
     <script src="../../../node_modules/popper.js/dist/umd/popper.min.js"></script>
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/manipulator.js"></script>

js/tests/visual/scrollspy.html

@@ -86,7 +86,6 @@
       <p>Ad leggings keytar, brunch id art party dolor labore.</p>
     </div>
 
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/data.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>

js/tests/visual/tab.html

@@ -222,7 +222,6 @@
     </div>
 
     <script src="../../../node_modules/popper.js/dist/umd/popper.min.js"></script>
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/data.js"></script>

js/tests/visual/toast.html

@@ -52,7 +52,6 @@
       </div>
     </div>
 
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/manipulator.js"></script>
     <script src="../../dist/dom/data.js"></script>

js/tests/visual/tooltip.html

@@ -70,7 +70,6 @@
     </div>
 
     <script src="../../../node_modules/popper.js/dist/umd/popper.min.js"></script>
-    <script src="../../dist/dom/polyfill.js"></script>
     <script src="../../dist/dom/selector-engine.js"></script>
     <script src="../../dist/dom/event-handler.js"></script>
     <script src="../../dist/dom/manipulator.js"></script>