Is it safe to remove these directories?

I uninstalled the digium phones module, rest api, and rest apps and even though I selected remove from disk I have the 3 directories below on the disk. Is t safe to remove them?
restapiand digium_phones is empty. restapps is full of zip files.

/var/www/html/restapi
/var/www/html/restapps
/var/www/html/digium_phones