feat: remove test server from SDK repo (it's in it's own repo now!)

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

:exclamation: No coverage uploaded for pull request base (alpha@4dc4125). Click here to learn what that means.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## alpha #170 +/- ## ======================================== Coverage ? 69.42% ======================================== Files ? 16 Lines ? 520 Branches ? 103 ======================================== Hits ? 361 Misses ? 132 Partials ? 27 ```

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