Remove duplicated text about routes in MTU block

[hawson]

There is a duplicated paragraph about routing in the MTU block

[pirate]

Where is this duplicated? If you mean it's duplicated in the wg-quick docs, that's fine I'd rather keep it in both places to make these docs complete.

[hawson]

Where is this duplicated? If you mean it's duplicated in the wg-quick docs,

No, I mean that this text appears in the both the Table section:

There are two special values: ‘off’ disables the creation of routes altogether, and ‘auto’ (the default) adds routes to the default table and enables special handling of default routes.

And again in the MTU section:

There are two special values: ‘off’ disables the creation of routes altogether, and ‘auto’ (the default) adds routes to the default table and enables special handling of default routes.

It should only appear in the Table section.

[hawson]

Specifically, these two lines are duplicated:
https://github.com/pirate/wireguard-docs/blame/master/README.md#L658
https://github.com/pirate/wireguard-docs/blame/master/README.md#L674