`AbstractInstruction` has a redundant `size` field unnecessary for the majority of instructions. We should add this field to the 2 switch instructions that need it only.
------------- Commit messages: - 8339519: Remove size field from instructions Changes: https://git.openjdk.org/jdk/pull/20880/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20880&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8339519 Stats: 73 lines in 1 file changed: 8 ins; 12 del; 53 mod Patch: https://git.openjdk.org/jdk/pull/20880.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20880/head:pull/20880 PR: https://git.openjdk.org/jdk/pull/20880
