feat(lib): remove dependency on `tracing`'s `log` feature (#2342)
feat(lib): remove dependency on `tracing`'s `log` feature (#2342)

Closes #2326

BREAKING CHANGE: hyper no longer emits `log` records automatically.
  If you need hyper to integrate with a `log` logger (as opposed to `tracing`),
  you can add `tracing = { version = "0.1", features = ["log"] }` to activate them.
hyperium/hyper,hyperium/hyper,hyperium/hyper,tshepang/hyper,tshepang/hyper,tshepang/hyper