Remove unused dependencies

Author: dstallenberg

package.json

@@ -53,22 +53,16 @@
     "@truffle/config": "^1.2.44",
     "@truffle/provider": "^0.1.17",
     "bignumber.js": "^9.0.1",
-    "chai": "^4.3.3",
-    "chai-as-promised": "^7.1.1",
     "chalk": "^2.4.2",
     "clear": "^0.1.0",
     "detect-port": "^1.3.0",
     "figlet": "^1.5.0",
     "fs-extra": "^8.1.0",
     "ganache-cli": "6.9.0",
-    "ghost-testrpc": "^0.0.2",
     "global-modules": "^2.0.0",
     "globby": "^10.0.1",
-    "jsonschema": "^1.2.4",
     "lodash": "^4.17.15",
     "mocha": "^8.3.1",
-    "node-emoji": "^1.10.0",
-    "original-require": "^1.0.1",
     "pify": "^4.0.1",
     "recursive-readdir": "^2.2.2",
     "sc-istanbul": "^0.4.5",