[gtkglext] Don't use AC_C_CONST; we don't support C compilers that don't support "const".

[Braden McDaniel <bradenmcd src gnome org>]

commit d4d0279d70df81e8b2e66d0ec7e7fa416566d65a
Author: Braden McDaniel <braden bolt endoframe net>
Date:   Wed Dec 16 20:50:02 2009 -0500

    Don't use AC_C_CONST; we don't support C compilers that don't support "const".

 configure.ac |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 566d038..9d1e664 100644
--- a/configure.ac
+++ b/configure.ac
@@ -281,9 +281,6 @@ PKG_CHECK_MODULES([PANGOFT2], [pangoft2], ,
 AC_HEADER_STDC
 AC_CHECK_HEADERS([inttypes.h stdlib.h string.h])
 
-# Checks for typedefs, structures, and compiler characteristics.
-AC_C_CONST
-
 # Checks for library functions.
 save_LIBS="$LIBS"
 LIBS="$LIBS $MATH_LIB"