Remove `<C-C>` and `<C-X>` INSERT mode shortcuts
Remove `<C-C>` and `<C-X>` INSERT mode shortcuts

`<C-C>` copies a line in insert mode and `<C-X>` cuts a line in insert
mode. They're not particularly essential, just conveniences. But `<C-X>`
causes problems in termux as reported in #8. And `<C-C>` is just
a natural companian command, so it'd be weird to have one without the
other.

tombh/novim-mode