Revert "Add check for glib 2.12 to configure, primarily checking for"

This reverts commit d9d36a33.

config.h.in

@@ -24,9 +24,6 @@
 /* Define to 1 if using glib-2.32.0 or higher */
 #undef GLIB_NEW_THREADS
 
-/* Define to 1 if using glib-2.12.0 or higher */
-#undef GLIB_PTHREAD_GETNAME
-
 /* Define to 1 if licensed under terms of the GNU General Public License. */
 #undef GPL_LICENSED
 

configure

@@ -22789,12 +22789,6 @@ rm -f core conftest.err conftest.$ac_objext \
   rm -f conf.glibtest
-if test ${glib_config_minor_version=0} -ge 12 ; then
-
-$as_echo "#define GLIB_PTHREAD_GETNAME 1" >>confdefs.h
-
-fi
-
 if test ${glib_config_minor_version=0} -ge 32 ; then
 $as_echo "#define GLIB_NEW_THREADS 1" >>confdefs.h

configure.ac

@@ -276,10 +276,6 @@ fi
 
 AM_PATH_GLIB_2_0([2.7.1], [ac_glib_test="yes"], [ac_glib_test="no"], [gthread])
 
-if test ${glib_config_minor_version=0} -ge 12 ; then
-       AC_DEFINE([GLIB_PTHREAD_GETNAME], 1, [Define to 1 if using glib-2.12.0 or higher])
-fi
-
 if test ${glib_config_minor_version=0} -ge 32 ; then
        AC_DEFINE([GLIB_NEW_THREADS], 1, [Define to 1 if using glib-2.32.0 or higher])
 fi