target/mips: Drop left-over comment about Jazz machine

target/mips: Drop left-over comment about Jazz machine

Commit 3803b6b427 ("target/mips: Fold jazz behaviour into
mips_cpu_do_transaction_failed") removed update on TCGCPUOps
and commit 119065574d ("hw/core: Constify TCGCPUOps") made
it const. Remove the now irrelevant comment.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241115152053.66442-2-philmd@linaro.org>