linaro-android-kernel-tests.sh: remove test for sync

since the sync implementation is not supported by kernel 4.9+

Change-Id: I6a4f326f243622ba9c9a0a1e90cb98abe951f793
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
(cherry picked from commit 602cc4a9928ab8da602ce5c737fe4ce367bff4c4)
diff --git a/linaro-android-kernel-tests.sh b/linaro-android-kernel-tests.sh
index 2d57c95..d756580 100755
--- a/linaro-android-kernel-tests.sh
+++ b/linaro-android-kernel-tests.sh
@@ -87,7 +87,7 @@
 
 run_all() {
     echo "Running all tests"
-    TESTS="ashmem ashmem_expanded binder sync vfat swp-swpb"
+    TESTS="ashmem ashmem_expanded binder vfat swp-swpb"
     run_tests
 }