hw/ide: Remove DSCM-1XXXX microdrive device model

The DSCM-1XXXX microdrive device model was used only by the
XScale-based Zaurus machine types.  Now they have been removed, we
can delete this device too.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20241003140010.1653808-4-peter.maydell@linaro.org
4 files changed