chore(clean-shrinkwrap): drop from property from the clean shrinkwrap

it usually contains urls to temp directories which are not interesting, the info
we do want to preserve is in the `resolved` property and we do keep that one.

Author: IgorMinar

npm-shrinkwrap.clean.json

@@ -3255,7 +3255,6 @@
     },
     "grunt-jasmine-node": {
       "version": "0.1.0",
-      "from": "../../../../var/folders/_9/p__8cpj15lx5t538ggg0v2_w003k9q/T/npm-79025-87a1c15f/git-cache-9b6dfb6b81b8/ced17cbe52c1412b2ada53160432a5b681f37cd7",
       "resolved": "git://github.com/vojtajina/grunt-jasmine-node.git#ced17cbe52c1412b2ada53160432a5b681f37cd7"
     },
     "grunt-jscs": {

scripts/clean-shrinkwrap.js

@@ -14,9 +14,9 @@ var fs = require('fs');
 
 function cleanModule(module, name) {
 
-  // keep `from` and `resolve` properties for git dependencies, delete otherwise
+  // keep `resolve` properties for git dependencies, delete otherwise
+  delete module.from;
   if (!(module.resolved && module.resolved.match(/^git(\+[a-z]+)?:\/\//))) {
-    delete module.from;
     delete module.resolved;
   }