Remove the TemplateMacros tests

These were more useful when our usage of React was less prevalent.
Nowadays the React versions are used on a lot more pages, so it's not so
important to check that they exactly match the TT versions.

Author: mwiencek

package.json

@@ -82,7 +82,6 @@
     "flow-bin": "0.157.0",
     "gettext-parser": "3.1.0",
     "http-proxy": "1.18.1",
-    "jsdom": "13.2.0",
     "json5": "2.1.3",
     "nyc": "14.1.1",
     "path-browserify": "1.0.1",