Update app.py

app.py

@@ -18,7 +18,7 @@ os.system("python3 -m pip install --upgrade pip")
 os.system("git clone --branch=main https://github.com/magenta/mt3")
 os.system("mv mt3 mt3_tmp; mv mt3_tmp/* .; rm -r mt3_tmp")
 os.system("python3 -m pip install -e .")
-os.system("pip install tensorflow_cpu")
+
 # copy checkpoints
 os.system("gsutil -q -m cp -r gs://mt3/checkpoints .")