delete the mapkey from config.pro but when import it again came back?

Dear All,

I made a config.pro file it has so many mapkeys but one of the key i made like " 1 " for plane on/off ,now i want to delete it from my config.pro .

but everytime when i delete it came again .

i checked the notepad file to delete from there but there that mapkey not found

Please help what to do?

Thanks

Manish