Reduce dependencies in reqwest-retry

[zaczkows]

This pull request is trying to reduce dependencies by:

• removing not used deps or disabling default features
• making tracing dependency optional and using log instead

I hope I did cfg correctly as I'm doing it first time

[zaczkows]

I did something wrong, because it works without any features, but macro should fail...

[zaczkows]

hmmm... looks complex :disappointed:

[LukeMathWalker]

making tracing dependency optional and using log instead

Those crates are not the same, and the choice of tracing here is very intentional.

[zaczkows]

I think I understand the idea, but would then at least be ok to make tracing optional? I can imagine many applications that doesn't need or even want to have tracing.

[LukeMathWalker]

I can imagine many applications that doesn't need or even want to have tracing.

This is the first time someone has expressed this need since this library was created, so there are probably not that many. Having tracing as optional could be accepted, but it'd have to be properly tested in CI.

[zaczkows]

Reduced scope as requested

[zaczkows]

Sorry for a delay, but all the changes should be there