This patch removes many unused variables and one unused label reported by the compilers when relevant warnings are enabled.
The unused code was found by compiling after removing `unused` from the list of disabled warnings for [gcc](https://github.com/openjdk/jdk/blob/master/make/autoconf/flags-cflags.m4#L190) and [clang](https://github.com/openjdk/jdk/blob/master/make/autoconf/flags-cflags.m4#L203), and enabling [C4189](https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4189?view=msvc-170) MSVC warning. I only removed variables that were uninitialized or initialized without side effects. I verified that the removed variables were not used in any `#ifdef`'d code. I checked that the changed code still compiles on Windows, Linux and Mac, both in release and debug versions. ------------- Commit messages: - Remove unused variables (windows) - Remove unused variables (macos) - Remove unused variables (linux) Changes: https://git.openjdk.org/jdk/pull/9383/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9383&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8289768 Stats: 69 lines in 45 files changed: 0 ins; 65 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/9383.diff Fetch: git fetch https://git.openjdk.org/jdk pull/9383/head:pull/9383 PR: https://git.openjdk.org/jdk/pull/9383
