[librsvg] configure: Remove pdiff Makefile

[Benjamin Otte <otte src gnome org>]

commit 45c4257be73961d31e8d21265dede1cd2e550420
Author: Benjamin Otte <otte redhat com>
Date:   Thu Oct 22 13:49:33 2015 +0200

    configure: Remove pdiff Makefile
    
    Forgot to remove this one when I removed pdiff

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2e490d2..3bb3bb7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -270,7 +270,6 @@ Makefile
 librsvg-zip
 gdk-pixbuf-loader/Makefile
 tests/Makefile
-tests/pdiff/Makefile
 tools/Makefile
 doc/Makefile
 doc/version.xml