Delete useTurboModules() from ReactNativeNewArchitectureFeatureFlags (#56900)

Summary:

The `useTurboModules()` flag is being removed entirely; it was always set to true in the canary release stage. All callers of `ReactNativeNewArchitectureFeatureFlags.useTurboModules()` were inlined in earlier diffs.

This diff:
- Removes the wrapper method `ReactNativeNewArchitectureFeatureFlags.useTurboModules()`.
- Removes the `override fun useTurboModules(): Boolean = true` from `ReactNativeNewArchitectureFeatureFlagsDefaults`.

Both classes are non-`generated`, so they are edited directly. A follow-up diff will flip the underlying `ReactNativeFeatureFlags.useTurboModules()` default to `true` and ultimately remove the API by regenerating the codegen output.

Behavior is unchanged.

Changelog:
[Internal]

Differential Revision: D105718202

Author: mdvacca

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeNewArchitectureFeatureFlags.kt

@@ -58,16 +58,4 @@ public object ReactNativeNewArchitectureFeatureFlags {
     }
     return ReactNativeFeatureFlags.useTurboModuleInterop()
   }
-
-  @JvmStatic
-  public fun useTurboModules(): Boolean {
-    if (ReactBuildConfig.UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE) {
-      Assertions.assertCondition(
-          ReactNativeFeatureFlags.useTurboModules(),
-          "ReactNativeFeatureFlags.useTurboModules() should be set to TRUE when Strict Mode is enabled",
-      )
-      return true
-    }
-    return ReactNativeFeatureFlags.useTurboModules()
-  }
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeNewArchitectureFeatureFlagsDefaults.kt

@@ -28,6 +28,4 @@ public open class ReactNativeNewArchitectureFeatureFlagsDefaults() :
   override fun useNativeViewConfigsInBridgelessMode(): Boolean = true
 
   override fun useTurboModuleInterop(): Boolean = true
-
-  override fun useTurboModules(): Boolean = true
 }