Environment variables are not deleted, what the...?

Question

linux

Hello.
I used to use a proxy through cntlm in corp. network to access the internal server.
All requests were redirected to localhost:666. :)
Now it is not required. Removed cntlm and its config, removed proxy environment variables from /etc/environment.
Like everything. - I thought.
I enter the command env. And all the environment variables for the proxy remained there.
Tried to delete through unset <variable_name> and through env -u <variable_name> - variables disappear, and then reappear.
warmed up the entire system for the presence of the localhost:666 and 127.0.0.1:666 lines in the files. (grep -rnHE --color 'localhost:666' /)
Found only in backups of /etc/environment.bak files and that's it.
Those. there are no proxy variables anywhere in the working files, but it is taken from somewhere.
Please help me understand and find where it comes from. Maybe I'm missing something?

Answer 1

Did you reboot? ) If it remains, then look carefully