Merge pull request #150983 from cockroachdb/blathers/backport-release-25.3-150949

release-25.3: span: clean up test code after llrb frontier deletion

Author: andyyang890

pkg/util/span/BUILD.bazel

@@ -34,7 +34,6 @@ go_test(
     embed = [":span"],
     deps = [
         "//pkg/roachpb",
-        "//pkg/testutils",
         "//pkg/util/hlc",
         "//pkg/util/leaktest",
         "//pkg/util/log",