entrypoint.sh cleanup

entrypoint.sh

@@ -3,12 +3,10 @@
 urlencode() {
         python - <<END
 from urllib.parse import quote
-import urllib
 import os
-from urllib.parse import urlencode
 api_host = os.environ.get('CHE_API_EXTERNAL')
 # double-encode url
-print(urllib.parse.quote(urllib.parse.quote(api_host, safe=""), safe=""))
+print(quote(quote(api_host, safe=""), safe=""))
 END
 }