What do you mean exactly? If you are not interested in using it anymore, just move or delete it from the Navigator --> "Data" folder of your Android Device.
I'm afraid that is not possible in Android. Navigator will open all downloaded maps. The only way to do it is to rename the .mca map files that you don't want to see.
@chattiewoman and Jan_Gruuthuse deleting maps is not what I wanted to do. I'm using a WinCE and a Android device. In the Win-Version (like the PC-Version for Windows) you can dis- or enable maps, that you want to see or even not. I asked for the information, because I often create my own maps with digger, when I'm going to make a tour. In that way I collect lots of "tracks" for driving.
So, the only way for me in Android is to delete maps, I don't want to see. :(
I could even ask, why has the Win-Version this option?
Short explained.
I've created lots of tracks for riding by motorbike (with diggerQt in own mca-files). All these mca-maps are on my WinCE-device. When I'm going to make a tour, I can show or hide all other tracks, but don't have to delete them.
And disableing maps should rise the performance of older devices. Okay, my Android-device is quit fast, and there is now need to disable real maps (single countries). But (for me) it would be nice to have the disable option for maps.