Remove useTurboModules assertion from ReactHostImpl.getOrCreateStartTask (#56927)

Summary:
Pull Request resolved: #56927

The `useTurboModules` flag is being deleted; it always returns true on the canary release stage. The DEBUG-gated assertion in `ReactHostImpl.getOrCreateStartTask()` is therefore tautological — remove it.

The `enableBridgelessArchitecture` assertion immediately above stays.

Behavior is unchanged.

Changelog:
[Internal]

Reviewed By: fkgozali

Differential Revision: D105718211

fbshipit-source-id: baca6b599af95247bd632096487eabfc2b9f3e94

Author: mdvacca

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.kt

@@ -856,11 +856,6 @@ public class ReactHostImpl(
           ReactNativeNewArchitectureFeatureFlags.enableBridgelessArchitecture(),
           "enableBridgelessArchitecture FeatureFlag must be set to start ReactNative.",
       )
-
-      Assertions.assertCondition(
-          ReactNativeNewArchitectureFeatureFlags.useTurboModules(),
-          "useTurboModules FeatureFlag must be set to start ReactNative.",
-      )
     }
     if (ReactBuildConfig.UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE) {
       Assertions.assertCondition(