DynamicPartitionControlAndroid: remove unused arg

Test: builds
Change-Id: I6a8375951c3ba5560a5ee91231419301e58776bd
diff --git a/dynamic_partition_control_android.h b/dynamic_partition_control_android.h
index 8f45682..07ce281 100644
--- a/dynamic_partition_control_android.h
+++ b/dynamic_partition_control_android.h
@@ -87,7 +87,7 @@
  private:
   friend class DynamicPartitionControlAndroidTest;
 
-  void CleanupInternal(bool wait);
+  void CleanupInternal();
   bool MapPartitionInternal(const std::string& super_device,
                             const std::string& target_partition_name,
                             uint32_t slot,