[gtk-doc] configure: remove old TRACE define

[Stefan Sauer <stefkost src gnome org>]

commit eb609e14870734ad85ba2f51e7f6dc7259cc4c8f
Author: Stefan Sauer <ensonic users sf net>
Date:   Thu Nov 2 07:51:33 2017 +0100

    configure: remove old TRACE define
    
    We used this with the perl version to comment all logging calls.

 configure.ac |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 698063b..ee24f65 100644
--- a/configure.ac
+++ b/configure.ac
@@ -169,13 +169,6 @@ AC_ARG_ENABLE([debug],
        [enable_debug="no"])
 AC_MSG_RESULT($enable_debug)
 
-if test "x$enable_debug" != "xno"; then
-       TRACE="LogTrace"
-else
-       TRACE="#"
-fi
-AC_SUBST(TRACE)
-
 dnl check what date format we can use for the makefile tracing in tests
 dnl this is mostly to detect the date command on macosx that is quite cripled
 dnl  and broken too