Revert accidental bridgelessEnabled=true for RN Tester (#41056)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/41056

As the title says,
I accidentally included this as the diff on top of it that would have made this flag toggleable was abandoned.

Changelog:
[Internal] [Changed] - Revert accidental bridgelessEnabled=true for RN Tester

Reviewed By: luluwu2032

Differential Revision: D50409804

fbshipit-source-id: 0e17883094f90e397544b2be0daee5f6cacd8756

packages/rn-tester/android/app/src/main/java/com/facebook/react/uiapp/RNTesterApplication.kt

@@ -129,7 +129,7 @@ class RNTesterApplication : Application(), ReactApplication {
     super.onCreate()
     SoLoader.init(this, /* native exopackage */ false)
     if (BuildConfig.IS_NEW_ARCHITECTURE_ENABLED) {
-      load(bridgelessEnabled = true)
+      load()
     }
   }
 }