Clean vars on main loop

workflow/qhtcp-workflow

@@ -237,7 +237,6 @@ ask() {
 }
 err() { echo "Error: $*" >&2; }
 ask_pn() {
-  unset PROJECT
   declare -ag ADD_PROJECTS
   example_pn="${PROJECT_PREFIX}_$(random_three_words)"
   cat <<-EOF
@@ -2250,6 +2249,7 @@ main() {
     done
 
   done
+  unset PROJECTS MODULE SUBMODULES EXCLUDE_MODULES
 }
 
 # (Safe) main loop