vim: disable external matchit plugins and use stock one
vim: disable external matchit plugins and use stock one

nvim already provides matchit by default and vim supports it after
v.8.0.0. Add modifications accordingly

Signed-off-by: Ratheesh S <f847af0ee3590f4912d169b886f309989d9e4c2e@gmail.com>
Tested-by: Ratheesh S <f847af0ee3590f4912d169b886f309989d9e4c2e@gmail.com>

ratheesh/dot-files,ratheesh/dot-files