Remove build script to write address/abi json

those are now in the kredits-contracts library

lib/contracts/index.js

@@ -1,32 +0,0 @@
-/*jshint node:true*/
-const writeFile = require('broccoli-file-creator');
-const mergeTrees = require('broccoli-merge-trees');
-const jsonModule = require('broccoli-json-module');
-
-module.exports = {
-  name: 'contracts',
-
-  treeForAddon: function(tree) {
-    let trees = [];
-    const files = require('kredits-contracts/lib');
-
-    let abis = {};
-    let addresses = {};
-
-    files.forEach(function(file) {
-      abis[file] = require(`kredits-contracts/lib/abis/${file}.json`);
-      addresses[file] = require(`kredits-contracts/lib/addresses/${file}.json`);
-    });
-
-    trees.push(writeFile(`abis/index.json`, JSON.stringify(abis)));
-    trees.push(writeFile(`addresses/index.json`, JSON.stringify(addresses)));
-
-    tree = jsonModule(mergeTrees(trees));
-
-    return this._super.treeForAddon.call(this, tree);
-  },
-
-  isDevelopingAddon: function() {
-    return true;
-  }
-};

lib/contracts/package.json

@@ -1,6 +0,0 @@
-{
-  "name": "contracts",
-  "keywords": [
-    "ember-addon"
-  ]
-}