i once had a similar Q.
Dont look too hard. there is a way, but its not throught a "text" file. Its some kind of binary file or something.
the command for adding & removing repositories is called "installation_sources"
here is example syntax:
installation_sources -e -a ftp://ftp.gwdg.de/pub/linux/suse/ftp....3/yast-source
i forgot what the "e" switch & "a" switch did, but basically this is an example of how i added in the "MISC" repository.
Im sure there is a switch to remove the repository, but you'd have to do some googling.
but "installation_sources" is most likely the command you will be using...
i hope this helps. if you do figure it out, let us know.
duh, figured it out!
just typing "installation_sources" (in the command line) and hitting enter gives you the switches.
(this lists your repositories for you)
and the "-d" swicth will disable them. im not going to try on mine because i like my sources = ]
So, coldsteel, try it out and let us know if disabling helps. (there has to be a way to Remove them though)
also, i bet we could add our repositories a LOT easier by somehow doing it this way....