drm/panel-elida-kd35t133: Drop prepare/unprepare logic

Drop the prepare/unprepare logic, as this is now tracked elsewhere
since this commit [1].

[1] commit d2aacaf0 ("drm/panel: Check for already prepared/enabled in drm_panel")

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20231117194405.1386265-6-macroalpha82@gmail.com


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231117194405.1386265-6-macroalpha82@gmail.com