message: Remove unnecessary `mut` qualifiers in fixture setup in `health` tests
diff: @@ -281,9 +281,9 @@ mod tests {
  /// Sets up fixtures used in almost every test.
  fn fixtures() -> Fixtures {
  - let mut clock = TestClock::new();
  + let clock = TestClock::new();
  let cfg = HealthConfig::test_config();
  - let mut rng = crate::new_rng();
  + let rng = crate::new_rng();
  let health = ConnectionHealth::new(clock.now());
  