[gnome-calendar] build: remove glib-gettext

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit bc6d40b7180e56af1f5922c3dc4726a9ebf3172a
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Jan 19 18:20:53 2016 -0200

    build: remove glib-gettext
    
    It's deprecated

 configure.ac |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 923208f..fe4c87e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,8 +23,6 @@ GETTEXT_PACKAGE=AC_PACKAGE_TARNAME
 AC_SUBST(GETTEXT_PACKAGE)
 AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [GETTEXT package name])
 
-AM_GLIB_GNU_GETTEXT
-
 ## don't rerun to this point if we abort
 AC_CACHE_SAVE