No need to export app version

src/bin/satcmd.skel

 shellfu import saturnin
 
 export SHELLFU_INIGREP_PATH SHELLFU_PATH SHELLFU_PRETTY_USAGE \
-       SATURNIN_APP_VERSION SATURNIN_CACHE_HOME
+       SATURNIN_CACHE_HOME
 
 usage() {
     mkusage "[-d|-v] command [args...]" \