refactor(react-router): simplify types

[MichaelDeBoey]

I could have gone with Omit, which would be less code, but I like the explicitness of Pick more in these cases

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[brophdawg11]

I actually had some something similar a while back to DRY it up a bit Michael and I agreed that it was easier to read the current definitions at a glance at the expense of some non-DRY code. These also change pretty infrequently so it's not something we have to remember to change in multiple places often.