bisect: use "bisect--helper" and remove "filter_skipped" function

diff --git a/t/t4115-apply-symlink.sh b/t/t4115-apply-symlink.sh
index 9ace578f17a07aafc050ccaf935aef8a4a3cab4e..1a3aea34cec6552f40271bbed60e42d199ef25be 100755 (executable)
--- a/t/t4115-apply-symlink.sh
+++ b/t/t4115-apply-symlink.sh
@@ -9,6 +9,13 @@ test_description='git apply symlinks and partial files
 
 . ./test-lib.sh
 
+if ! test_have_prereq SYMLINKS
+then
+       say 'Symbolic links not supported, skipping tests.'
+       test_done
+       exit
+fi
+
 test_expect_success setup '
 
        ln -s path1/path2/path3/path4/path5 link1 &&