perhaps what you are looking for is
:set noswapfile
for your .vimrc
sc
You'll want to read at
:help 'swapfile'
where you'll read that you should be able to use
:set noswapfile
along with caveats about large files and recovery. The only
reason I'd consider not using a swap-file is if the information
being edited was confidential, and I didn't want any trace of it
touching the disk improperly/unexpectedly. If it's because of
performance issues, you may prefer to put the swap file someplace
else, which can be controlled via the 'directory' option:
:help 'directory'
so if you're writing to a slow device (such as a floppy), you can
put your swapfile on a faster drive.
-tim