Remove unused ember-try package

Author: lukemelia

package.json

@@ -28,7 +28,6 @@
     "ember-qunit": "^4.4.1",
     "ember-source": "~3.12.0",
     "ember-source-channel-url": "^1.1.0",
-    "ember-try": "^1.0.0",
     "eslint": "^6.1.0",
     "eslint-plugin-ember": "^6.2.0",
     "eslint-plugin-node": "^9.0.1",