accel/tcg: Remove cpu_loop_exit_restore() stub

Not needed since commit 63e7af20352 ("hw/mips: Restrict ITU to TCG").

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250924165039.52250-1-philmd@linaro.org>
2 files changed