This PR removes OctalDigits as it is no longer used after the removal of StringTemplate.
------------- Commit messages: - remove OctalDigits Changes: https://git.openjdk.org/jdk/pull/23338/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23338&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8348898 Stats: 130 lines in 1 file changed: 0 ins; 130 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/23338.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23338/head:pull/23338 PR: https://git.openjdk.org/jdk/pull/23338
