There is no way to change it in model 2 emulator.
A lot of front-ends have a built in way to close it.
What front-end are you using? (in Mala, it's under "Mala hotkeys")
I don't like anything extra installed or running in the background either, but I always install Autohotkey on my emulation machines.
Just about any issue you'll come across in setting up oddball emulators can be overcome with Autohotkey.
Also if you install autohotkey on a different computer, you can compile the ahk script to an exe so it will run on a computer without autohotkey installed.