Remove vim swap files (#4581)

Trying to make the .gitignore a little more broad. Accidentally added in
#4553, I'm guessing as part of the force-push.

.gitignore

@@ -33,7 +33,7 @@
 \#*\#
 
 # vim temporary files
-.*.swp
+.*.sw[a-p]
 
 # generated by utils/treesitter/helix.sh
 /.helix/