remove unused dependencies leptos_axum and leptos_router

[vsuryamurthy]

In the process of preparing for 0.7 (atleast for leptos_axum), some dependencies were added but unnecessary as axum re-exports them.

[gbj]

Thanks for the PR. The CI was complaining about several things but I took too long to get to it, so I just fixed the cargo fmt issues and will let it run again.

[gbj]

Just to add some clarification for the CI error, the issue here is that cargo check --no-default-features on leptos_axum.

[vsuryamurthy]

There seems to be two more checks that fail. Should I just fix it although it doesnt seem to be this particular PR that is causing the fail?

[gbj]

Unless I'm misunderstanding, the two checks that I see failing are integrations/axum failing cargo check --no-default-features (because of the changes in the PR) and hackernews_js_fetch (failing because it uses leptos_axum without default features).

[vsuryamurthy]

Okay my bad, I see where it went wrong.

[benwis]

Thanks for working on this. It looks solid to reuse the axum exports here