refactor: 💡 remove last get-config use case

addons/rose/package.json

@@ -38,7 +38,6 @@
     "emberx-select": "github:adopted-ember-addons/emberx-select#bc5f774"
   },
   "devDependencies": {
-    "ember-get-config": "^0.3.0",
     "@babel/core": "^7.15.5",
     "@ember/optional-features": "^2.0.0",
     "@ember/test-helpers": "^2.4.2",

addons/rose/tests/dummy/app/initializers/deprecations.js

@@ -1,9 +1,8 @@
 import { registerDeprecationHandler } from '@ember/debug';
-import config from 'ember-get-config';
 
-const isTesting = config.environment === 'test';
-
-export function initialize(/* application */) {
+export function initialize(application) {
+  const config = application.resolveRegistration('config:environment');
+  const isTesting = config.environment === 'test';
   if (isTesting) {
     // Disable all deprecations for now in tests.
     registerDeprecationHandler((/*message, options, next*/) => {

yarn.lock

@@ -9984,7 +9984,7 @@ ember-focus-trap@^0.7.0:
     ember-modifier-manager-polyfill "^1.2.0"
     focus-trap "^6.4.0"
 
-"ember-get-config@^0.2.4 || ^0.3.0", ember-get-config@^0.3.0:
+"ember-get-config@^0.2.4 || ^0.3.0":
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/ember-get-config/-/ember-get-config-0.3.0.tgz#a73a1a87b48d9dde4c66a0e52ed5260b8a48cfbd"
   integrity sha512-0e2pKzwW5lBZ4oJnvu9qHOht4sP1MWz/m3hyz8kpSoMdrlZVf62LDKZ6qfKgy8drcv5YhCMYE6QV7MhnqlrzEQ==