hw/net: Remove mipsnet device model

The mipsnet device model was only used by the mipssim machine,
which just got removed. Remove as now dead code.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20250828143800.49842-3-philmd@linaro.org>
5 files changed