Rip out the remainder of Bluebird

package.json

@@ -60,7 +60,6 @@
   "dependencies": {
     "babel-plugin-syntax-dynamic-import": "^6.18.0",
     "babel-runtime": "^6.26.0",
-    "bluebird": "^3.5.0",
     "blueimp-canvas-to-blob": "^3.5.0",
     "browser-encrypt-attachment": "^0.3.0",
     "browser-request": "^0.3.3",
@@ -120,7 +119,6 @@
     "babel-eslint": "^10.0.1",
     "babel-loader": "^7.1.5",
     "babel-plugin-add-module-exports": "^0.2.1",
-    "babel-plugin-transform-async-to-bluebird": "^1.1.1",
     "babel-plugin-transform-builtin-extend": "^1.1.2",
     "babel-plugin-transform-class-properties": "^6.24.1",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",