[MacPorts] #56612: Remove our realpath implementation from pextlib

[MacPorts]

#56612: Remove our realpath implementation from pextlib
-------------------------+--------------------
 Reporter:  ryandesign   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.5.2
 Keywords:               |       Port:
-------------------------+--------------------
 pextlib1.0 contains an implementation of realpath, to work around a bug in
 the versions of Tcl (8.4.7) shipped in Mac OS X Leopard and earlier:

 * [browser:macports-base/src/pextlib1.0/realpath.c]
 * [browser:macports-base/src/pextlib1.0/realpath.h]

 MacPorts bundles a copy of Tcl 8.5 now, and the bug was fixed in Tcl
 8.4.10 according to comment:ticket:21082:15, so that reason should no
 longer apply and perhaps this code could be removed. We should verify that
 the problem that it fixed on Leopard and earlier (#21082) remains fixed if
 the code is removed. (Is there a test for it?)

-- 
Ticket URL: <https://trac.macports.org/ticket/56612>
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