[gnome-documents] Fix autogen with latest gnome-common

[Seán de Búrca <sdeburca src gnome org>]

commit 0df869fd52405120dcfd29d5f68b03ead01c5168
Author: Seán de Búrca <leftmostcat gmail com>
Date:   Mon Aug 26 23:07:42 2013 -0600

    Fix autogen with latest gnome-common
    
    Side-by-side use of IT_PROG_INTLTOOL and AM_GNU_GETTEXT is not supported.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=706862

 configure.ac |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5d5007a..78f51eb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,9 +21,6 @@ AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE",[The name of the gettext d
 IT_PROG_INTLTOOL(0.40.0)
 PKG_PROG_PKG_CONFIG([0.22])
 
-AM_GNU_GETTEXT([external])
-AM_GNU_GETTEXT_VERSION([0.17])
-
 GOBJECT_INTROSPECTION_REQUIRE([0.9.6])
 
 ## don't rerun to this point if we abort