Deprecate old auth tools

[jaraco]

This change is the first of two phases for #1688.

[codecov]

Codecov Report

Merging #1689 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1689      +/-   ##
==========================================
- Coverage   78.18%   78.09%   -0.09%     
==========================================
  Files         106      106              
  Lines       13807    13847      +40     
==========================================
+ Hits        10795    10814      +19     
- Misses       3012     3033      +21

[webknjaz]

Plz don't remove tests as this will conflict with #1683. We need to move tests to valid implementation.

[jaraco]

conflict with #1683

Perhaps #1683 should disregard the deprecated modules?

We need to move tests to valid implementation.

Is that true? Or can we simply ignore them? If someone wishes to port/implement those tests for the new, preferred tools, I welcome that, but I'd consider that outside the scope of this effort.

[webknjaz]

This pull request fixes 1 alert - view on lgtm.com

fixed alerts:

• 1 for Potentially uninitialized local variable

---

Comment posted by lgtm.com

[jaraco]

I've removed the commit that removed the tests.

[webknjaz]

Actually, there's DeprecationTool in _cptools. And it looks like a right place for adding deprecation

[jaraco]

Hmm. I honestly don't understand how DeprecatedTool is meant to work. In the two places it's used, it's not wrapping another tool, but merely acting as a stand-in for another tool that was removed. I think we should remove the DeprecatedTool also, because its name betrays its purpose (it's not deprecating if it's replacing) and because there's no useful example of using it to deprecate a tool.