This is a followup to https://github.com/openjdk/jdk/pull/27118, to clean up resulting unused code. - remove `getChars`, `isExceptional` and `isNegative` - remove `ExceptionalBinaryToASCIIBuffer`; throws `IllegalArgumentException` instead of returning an instance of that.(Caller already asserts non-exceptional arg)
------------- Commit messages: - fix exception - clean up unused code Changes: https://git.openjdk.org/jdk/pull/27581/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27581&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8368968 Stats: 161 lines in 1 file changed: 1 ins; 158 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/27581.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27581/head:pull/27581 PR: https://git.openjdk.org/jdk/pull/27581
