Revert "Add pip upgrade"

This reverts commit b185e7227238c7653c2b1297d35cbdfc454fb63d.

hf.sh

@@ -25,7 +25,6 @@ then
   # Generate GISKARD_DEFAULT_API_KEY in demo space instead of set from Secrets
   export GISKARD_DEFAULT_API_KEY=gsk-$(cat /dev/urandom | tr -dc '[:alpha:]' | fold -w ${1:-28} | head -n 1)
   # Append demo worker supervisord item to conf
-  pip install --upgrade pip
   pip install -r /requirements.txt
   echo """
 [program:demo_worker]