Delete matching pair in insert mode

[jefftime]

When in insert mode, the auto pair feature will insert a closing pair to match the input. For example, typing ( will insert a ) immediately. I would appreciate it if deleting the ( would also delete the auto inserted ). I only expect this behavior when the pairs are next to each other (e.g. ()) as in other modern editors

This makes it a quick undo if I accidentally type a wrong pair

[jefftime]

I looked at auto_pairs.rs and it looks like there's a TODO comment in there to address this exact situation. I believe this issue can be closed

[kirawi]

Duplicate of #1673