target/mips: Remove unused CPUMIPSState::current_fpu field

The 'current_fpu' field is unused since commit f01be154589
("Move the active FPU registers into env again, and use more
TCG registers to access them").

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241021151253.36443-1-philmd@linaro.org>
2 files changed