test: remove unused index.test-d.ts file (#343)

* test: remove unused index.test-d.ts file

* build: remove prettier pattern with no matches

Author: dsanders11

package.json

@@ -28,7 +28,7 @@
     "mocha": "xvfb-maybe electron-mocha --reporter spec && mocha --reporter spec",
     "test": "yarn lint && yarn mocha",
     "lint": "yarn prettier:check",
-    "prettier": "prettier \"src/**/*.ts\" \"test/**/*.ts\" \"test/**/*.js\"",
+    "prettier": "prettier \"src/**/*.ts\" \"test/**/*.js\"",
     "prettier:check": "yarn prettier --check",
     "prettier:write": "yarn prettier --write",
     "prepare": "tsc"