fix(ember): Fix Test Flake

Revert "fix(ember): Fix merging env config (#4714)"

This reverts commit cc44957.

Author: k-fish

packages/ember/addon/instance-initializers/sentry-performance.ts

@@ -14,11 +14,6 @@ function getSentryConfig() {
   const _global = getGlobalObject<GlobalConfig>();
   _global.__sentryEmberConfig = _global.__sentryEmberConfig ?? {};
   const environmentConfig = getOwnConfig<OwnConfig>().sentryConfig;
-  if (!environmentConfig.sentry) {
-    environmentConfig.sentry = {
-      browserTracingOptions: {},
-    };
-  }
   Object.assign(environmentConfig.sentry, _global.__sentryEmberConfig);
   return environmentConfig;
 }