Mason331 - 2016-11-22

I am a new lshell user, not an admin. So, my apology if it is a FAQ.
I belive that my admin did not set any history_size on the /etc/lshell_config file.
After attempting to vi my .lshell_history file, deleting some entries with my passwords, saving it, re-login, the entries deleted in my previous session would still show up on my new session.
So, how could I delete some entries on my .lshell_history file permanently?
TIA