chore(browser build): remove old bower components

Remove stray references to bower components that we have chosen not
to use.

Author: laurelnaiad

browser/bower.json

@@ -37,11 +37,7 @@
     "angular-mocks": "1.2.20",
     "chai-as-promised": "4.1.1",
     "sinon-chai": "2.5.0",
-    "sinon-browser-only": "1.9.0",
-    "bootstrap": "3.2.0",
-    "open-sans-fontface": "1.1.0",
-    "lunr.js": "0.5.4",
-    "google-code-prettify": "1.0.2"
+    "sinon-browser-only": "1.9.0"
   },
   "overrides": {
     "modernizr": {