Remove unused crypto dependencies.

app/scripts/keyring-controller.js

@@ -1,5 +1,3 @@
-const scrypt = require('scrypt-async')
-const bitcore = require('bitcore-lib')
 const configManager = require('./lib/config-manager')
 const EventEmitter = require('events').EventEmitter
 

package.json

@@ -34,7 +34,6 @@
   },
   "dependencies": {
     "async": "^1.5.2",
-    "bitcore-lib": "^0.13.19",
     "browserify-derequire": "^0.9.4",
     "clone": "^1.0.2",
     "copy-to-clipboard": "^2.0.0",
@@ -80,7 +79,6 @@
     "redux-thunk": "^1.0.2",
     "request-promise": "^4.1.1",
     "sandwich-expando": "^1.0.5",
-    "scrypt-async": "^1.3.0",
     "textarea-caret": "^3.0.1",
     "three.js": "^0.73.2",
     "through2": "^2.0.1",