rm unused import fixes building tests without prime_server

[michaelkirk]

Issue

The tests fail to build without prime_server, even with -DENABLE_SERVICES=OFF -DENABLE_HTTP=OFF.

I was going to do something fancier with cmake including different tests depending on the config, but it actually looks like this import was unused anyway.

Context

I'm trying to build valhalla for use as a library (really I'm only looking at using odin at the moment), so I don't need the service integration. Further, prime_server is failing to build for me, but that's for another issue.

Tasklist

I don't think any of these are relevant to this PR, but LMK:

• Add tests
• Add #fixes with the issue number that this PR addresses
• Update the docs with any new request parameters or changes to behavior described
• Update the changelog
• If you made changes to the lua files, update the taginfo too.

[nilsnolde]

cool thanks. I wonder why circleci doesn't work for your PRs specifically, the other one too.. other external contributors don't have that problem I think (not many who are not part of the org somehow). anyways, OSX builds and runs the tests, that's good enough for this PR.

[michaelkirk]

I wonder why circleci doesn't work for your PRs specifically,

I might be wrong, but I think I ran into something similar in another repository:
flatgeobuf/flatgeobuf#280

tldr: I don't have a circle CI account. Last time I checked, using circle CI seems to require me to give circle ci read/write access to every one of my repositories, which is a pretty tough sell for me.