Remove unused script

Author: wooorm

package.json

@@ -61,7 +61,6 @@
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
     "test-api": "node test.js",
     "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
-    "test-types": "dtslint types",
     "test": "npm run build && npm run format && npm run test-coverage"
   },
   "prettier": {