Update app.py

app.py

@@ -303,7 +303,4 @@ def main():
         tester.display()
 
 if __name__ == '__main__':
-    os.system("pip install torch-scatter -f https://pytorch-geometric.com/whl/torch-1.7.1+cpu.html")
-    os.system("pip install torch-sparse -f https://pytorch-geometric.com/whl/torch-1.7.1+cpu.html")
-    os.system("pip install torch-geometric -f https://pytorch-geometric.com/whl/torch-1.7.1+cpu.html")
     main()