Of course, I did it.
After removing it, open a firefox and press "ctr + shift", you will start to input Iran language again! You can't "remove" it at all.
I even tried to edit keyboard layout file in etc somewhere, and then you can not switch to Iran anymore, BUT, after you reboot, the "magic" key "ctr+shift" start working again!! You will see all the strange Iran symbols again.
Obviously, this is a bug! The problem is that you can't disable the magic switching short key!! And you CAN'T delete the Iran keyboard layout, either.
Using Emacs is really important to me, with conflict with this "ctr+shift" short key, there is no way I can "correctly" use Emacs in Parsix. If this tiny small problem is not solved, I will have to switch back to Ubuntu. Someone please help me!