Remove dependenceis and use unpkg

package.json

@@ -34,7 +34,6 @@
     "gulp-series": "^1.0.2",
     "gulp-shell": "^0.6.5",
     "jshint": "^2.9.7",
-    "mocha": "^5.2.0",
     "webdriverio": "^4.14.1"
   },
   "jshintConfig": {
@@ -52,7 +51,6 @@
     "unused": true
   },
   "dependencies": {
-    "jsdom": "^13.0.0",
-    "sinon": "^7.2.0"
+    "jsdom": "^13.0.0"
   }
 }

tests/mocha/event_test.js

@@ -2,7 +2,7 @@
 // Declare some globals to make eslint happier.
 // TODO: make an eslint config that applies to this directory and put this
 // configuration in that file, instead of inline.
-/* global suite, test, chai, setup, teardown */
+/* global suite, test, setup, teardown */
 /* global sinon */
 
 /* global assertNotNull, assertNotUndefined, assertNull, assertEquals, isEqualArrays, assertUndefined */

tests/mocha/index.html

@@ -12,7 +12,7 @@
     <div id="mocha"></div>
     <script src="https://unpkg.com/chai/chai.js"></script>
     <script src="https://unpkg.com/mocha@5.2.0/mocha.js"></script>
-    <script src="../../node_modules/sinon/pkg/sinon.js"></script>
+    <script src="https://unpkg.com/sinon/pkg/sinon.js"></script>
     <script>
       mocha.setup({
         ui: 'tdd'