[tracker] configure.ac: Remove some unused variables

[Sam Thursfield <sthursfield src gnome org>]

commit 3d478b4fca2fc394ff0d2060e1a98c904a6d78ef
Author: Sam Thursfield <ssssam gmail com>
Date:   Sun Mar 27 14:30:51 2016 +0100

    configure.ac: Remove some unused variables

 configure.ac |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 03c498e..e659db0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -203,17 +203,13 @@ PYTHON_REQUIRED=2.6
 # Library required versions
 DBUS_REQUIRED=1.3.1
 GLIB_REQUIRED=2.40.0
-PANGO_REQUIRED=1.0.0
 GTK_REQUIRED=3.0.0
 LIBXML2_REQUIRED=2.6
-LIBNOTIFY_REQUIRED=0.4.3
 HAL_REQUIRED=0.5
 UPOWER_REQUIRED=0.9.0
-GDKPIXBUF_REQUIRED=2.12.0
 MEEGOTOUCH_REQUIRED=0.20
 POPPLER_REQUIRED=0.16.0
 CAIRO_REQUIRED=1.0
-GDK_REQUIRED=1.0
 LIBICU_REQUIRED=4.8.1.1
 LIBJPEG_REQUIRED="any version"
 LIBGIF_REQUIRED="any version"
@@ -231,7 +227,6 @@ CAMEL_REQUIRED=2.32.0
 GEE_REQUIRED=0.3
 TAGLIB_REQUIRED=1.6
 LIBGRSS_REQUIRED=0.7
-REST_REQUIRED=0.6
 NETWORK_MANAGER_REQUIRED=0.8
 GSTREAMER_REQUIRED=0.10.31
 GUPNP_DLNA_REQUIRED=0.9.4