[tor-bugs] #31699 [Core Tor/Tor]: Remove unused configure.ac checks

[Tor Bug Tracker & Wiki]

#31699: Remove unused configure.ac checks
--------------------------+----------------------------------
 Reporter:  nickm         |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: unspecified
Component:  Core Tor/Tor  |        Version:  Tor: unspecified
 Severity:  Normal        |     Resolution:
 Keywords:  easy          |  Actual Points:
Parent ID:  #31698        |         Points:
 Reviewer:                |        Sponsor:
--------------------------+----------------------------------

Comment (by cypherpunks):

 Replying to [comment:1 bduszel]:
 > Update results from running nickm's script:

 Those are probably the exact same identical results as nickm got
 originally and nothing changed in the meantime.

 The posted list was manually pruned to include only those nickm was
 confident would be safe to remove, i.e. all the ones starting with
 `HAVE_`. (in particular, the others like `_LARGE_FILES` and
 `_POSIX_SOURCE` and anything starting with `_` is intended to be used by
 system headers and might be really important).

 >  Some of these macros are used in system header files, but we can safely
 remove the autoconf checks for the ones that are not. I think they are:

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31699#comment:2>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online