formatting

Author: annzimmer

firebase-ml-modeldownloader/src/main/java/com/google/firebase/ml/modeldownloader/internal/ModelFileManager.java

@@ -23,7 +23,6 @@
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.annotation.WorkerThread;
-import com.google.android.gms.common.internal.Preconditions;
 import com.google.firebase.FirebaseApp;
 import com.google.firebase.ml.modeldownloader.CustomModel;
 import com.google.firebase.ml.modeldownloader.FirebaseMlException;