remove unused version script

package.json

@@ -19,7 +19,6 @@
     "lint:js:fix": "eslint . --fix",
     "lint:sol": "solhint --max-warnings 0 \"contracts/**/*.sol\"",
     "prepack": "npm run build",
-    "version": "scripts/version.js",
     "test": "npm run compile && scripts/test.sh"
   },
   "repository": {

scripts/version.js

-#!/usr/bin/env node
-
-// Synchronizes ethpm.json version number with package.json.
-// Useful to run as an npm script alogn with `npm version`.
-
-const fs = require('fs');
-const cp = require('child_process');
-
-const pkg = require('../package.json');
-const ethpm = require('../ethpm.json');
-
-ethpm.version = pkg.version;
-
-fs.writeFileSync('ethpm.json', JSON.stringify(ethpm, null, 2) + '\n');
-
-cp.execSync('git add ethpm.json');