Remove unnecessary pify dependency

Signed-off-by: Kevin Locke <[email protected]>

Author: kevinoid

package.json

@@ -59,7 +59,6 @@
     "mocha": "^6.0.0",
     "nodecat": "^2.0.0",
     "nyc": "^14.0.0",
-    "pify": "^4.0.0",
     "rimraf": "^3.0.0"
   },
   "engines": {