[tor-bugs] #20830 [Core Tor/Tor]: Remove legacy guard algorithm code

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#20830: Remove legacy guard algorithm code
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 Reporter:  nickm         |          Owner:
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  tor-guard     |  Actual Points:
Parent ID:  #20822        |         Points:
 Reviewer:                |        Sponsor:
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Comment (by nickm):

 On my prop271_030_v1 branch, in commit
 472a621ccc8a90bf90d8394210519974ad235848, I've wrapped all the legacy code
 in #ifdefs.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20830#comment:3>
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