demangle: remove an old TODO comment

Summary:
Both the autoconf and cmake build scripts check for
`cplus_demangle_v3_callback()` and define
`FOLLY_HAVE_CPLUS_DEMANGLE_V3_CALLBACK` appropriately.

Reviewed By: meyering

Differential Revision: D6745365

fbshipit-source-id: 3020593c60a21568781b835490b8d64913366cb9

diff --git a/folly/Demangle.cpp b/folly/Demangle.cpp
index 4709106c4c50c6282780c548b6a7689c2d367aba..cb80b21fc6e0d646bc7b8e10c98258dd02847383 100644 (file)
--- a/folly/Demangle.cpp
+++ b/folly/Demangle.cpp
@@ -27,8 +27,6 @@
 
 // From libiberty
 //
-// TODO(tudorb): Detect this with autoconf for the open-source version.
-//
 // __attribute__((__weak__)) doesn't work, because cplus_demangle_v3_callback
 // is exported by an object file in libiberty.a, and the ELF spec says
 // "The link editor does not extract archive members to resolve undefined weak