message: Automated visibility attribute cleanup.
  Tested:
  Local presubmit tests passed.
diff: @@ -159,9 +159,7 @@ cc_library_mozc(
  "session_interface.h",
  ],
  hdrs = ["session.h"],
  - visibility = [
  - "//:__subpackages__",
  - ],
  + visibility = ["//:__subpackages__"],
  deps = [
  ":session_converter",
  ":session_usage_stats_util",
  