[pitivi] build: Do not try to get find introspection related files

[Thibault Saunier <tsaunier src gnome org>]

commit d3e3e37d105c2833f7eb86bac39db87149b41309
Author: Thibault Saunier <tsaunier gnome org>
Date:   Wed Apr 20 09:51:18 2016 -0300

    build: Do not try to get find introspection related files
    
    We do not need it anymore
    
    Reviewed-by: Alex Băluț <alexandru balut gmail com>
    Differential Revision: https://phabricator.freedesktop.org/D936

 configure.ac |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0308bda..534a29a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,3 @@
-m4_define([gi_req_version], [1.31.1])
 m4_define([glib_req_version], [2.30.0])
 m4_define([gstreamer_req_version], [1.6.0])
 m4_define([gtk_req_version], [3.10.0])
@@ -80,10 +79,6 @@ AC_SUBST(CONFIGURED_GI_TYPELIB_PATH)
 
 AC_CONFIG_FILES([bin/pitivi], [chmod +x bin/pitivi])
 
-dnl === GObject introspection =================================================
-
-GOBJECT_INTROSPECTION_CHECK([gi_req_version])
-
 PKG_CHECK_MODULES(GTK, [gtk+-3.0 >= gtk_req_version],
                         [HAVE_GTK=yes],
                         [HAVE_GTK=no])