[gegl] tests: edge-sobel test superceded by reference hash

[Øyvind Kolås <ok src gnome org>]

commit 11574258036d3896c3cbd756565a075aec6ef815
Author: Øyvind Kolås <pippin gimp org>
Date:   Mon Mar 13 22:11:07 2017 +0100

    tests: edge-sobel test superceded by reference hash

 tests/compositions/Makefile.am              |    1 -
 tests/compositions/edge-sobel.xml           |   14 --------------
 tests/compositions/reference/edge-sobel.png |  Bin 629008 -> 0 bytes
 3 files changed, 0 insertions(+), 15 deletions(-)
---
diff --git a/tests/compositions/Makefile.am b/tests/compositions/Makefile.am
index 306d8b0..1c2829e 100644
--- a/tests/compositions/Makefile.am
+++ b/tests/compositions/Makefile.am
@@ -31,7 +31,6 @@ TESTS = \
   contrast-curve.xml              \
   edge.xml                        \
   edge-laplace.xml                \
-  edge-sobel.xml                  \
   engrave.xml                     \
   fattal02.xml                    \
   gegl.xml                        \