I've uninstalled the Memcache API and integration module from my site and then deleted it's folder from
Then, my site was down, and a WSOD appeared instead.
I went to Drush and typed
drush cc all, and then this came up:
Afterwards I restored the deleted memcache folder at sites/all/modules, and again typed drush cc all... Then the site came to work, but now when I run Drush I still so something wired:
Why I have a WSOD when I remove the module's folder if the module itself doesn't even enabled?...
How can totally delete the module?
Update for user - Les Lim: