chore: remove content-free firebase.functions from genereated reference page (firebase#86)

Author: taeold

docs/generate.sh

@@ -82,8 +82,7 @@ if [[ "$OUTDIR" == "" ]]; then
 fi
 
 TITLE="Firebase Python SDK for Cloud Functions"
-PY_MODULES='firebase_functions
-            firebase_functions.core
+PY_MODULES='firebase_functions.core
             firebase_functions.alerts_fn
             firebase_functions.alerts.app_distribution_fn
             firebase_functions.alerts.billing_fn