[gtk+] reftests: Remove a test using -gtk-gradient

[Matthias Clasen <matthiasc src gnome org>]

commit 99ae996a71ed66bc1886d110f5c0cda5617cef6f
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Mar 31 13:58:18 2017 -0400

    reftests: Remove a test using -gtk-gradient
    
    No longer available.

 testsuite/reftests/Makefile.am                  |    3 ---
 testsuite/reftests/border-image-gradient.css    |   23 -----------------------
 testsuite/reftests/border-image-gradient.ref.ui |   21 ---------------------
 testsuite/reftests/border-image-gradient.ui     |   21 ---------------------
 4 files changed, 0 insertions(+), 68 deletions(-)
---
diff --git a/testsuite/reftests/Makefile.am b/testsuite/reftests/Makefile.am
index 8644e1c..9a50a14 100644
--- a/testsuite/reftests/Makefile.am
+++ b/testsuite/reftests/Makefile.am
@@ -144,9 +144,6 @@ testdata = \
        border-image-excess-size.css \
        border-image-excess-size.ref.ui \
        border-image-excess-size.ui \
-       border-image-gradient.css \
-       border-image-gradient.ref.ui \
-       border-image-gradient.ui \
        border-image-url-scaled.css \
        border-image-url-scaled.ref.ui \
        border-image-url-scaled.ui \