remove provider-engine as it has been creating lots of issues

lib/tests/test.js

@@ -44,7 +44,6 @@ class Test {
   }
 
   initWeb3Provider(callback) {
-    const self = this;
     if (this.provider) {
       this.provider.stop();
     }

package-lock.json

@@ -5566,11 +5566,6 @@
         }
       }
     },
-    "is-date-object": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/is-date-object/-/is-date-object-1.0.1.tgz",
-      "integrity": "sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY="
-    },
     "is-descriptor": {
       "version": "0.1.6",
       "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-0.1.6.tgz",
@@ -5754,11 +5749,6 @@
         "html-comment-regex": "^1.1.0"
       }
     },
-    "is-symbol": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.1.tgz",
-      "integrity": "sha1-PMWfAAJRlLarLjjbrmaJJWtmBXI="
-    },
     "is-typedarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",

test_apps/test_app/test/simple_storage_spec.js

@@ -4,11 +4,6 @@ let accounts;
 const Utils = require('embarkjs').Utils;
 
 config({
-  deployment: {
-    type: 'ws',
-    host: 'localhost',
-    port: '8546'
-  },
   contracts: {
     "SimpleStorage": {
       args: [100],