Use node instead of requirejs

package.json

@@ -31,7 +31,6 @@
     "@types/mathjax": "0.0.31",
     "@types/mocha": "^2.2.32",
     "@types/node": "0.0.1",
-    "@types/requirejs": "^2.1.28",
     "@types/sanitize-html": "^1.13.31",
     "awesome-typescript-loader": "^2.2.4",
     "concurrently": "^2.0.0",

test/src/tsconfig.json

@@ -6,7 +6,7 @@
     "module": "commonjs",
     "moduleResolution": "node",
     "target": "ES5",
-    "types": ["mocha", "expect.js", "requirejs"],
+    "types": ["mocha", "expect.js", "node"],
     "outDir": "../build",
     "sourceMap": true
   }