Remove unused import and fix test_cases argument

app.py

@@ -13,7 +13,6 @@ from pathlib import Path
 import evaluate
 import sys
 import evaluate
-import datasets
 
 logger = get_logger(__name__)
 
@@ -65,4 +64,4 @@ def launch_gradio_widget(metric, test_cases):
 
 module = evaluate.load("danieldux/metric_template_1")
 
-launch_gradio_widget(module, test_cases)
+launch_gradio_widget(module, [test_cases])