ANDROID: drm: kirin960: Remove one mode-line that seems to be causing trouble

Alessio Balsini reported issues with his GeeekPi 7" monitor
after we added the wider mode support.

While this mode may work ok on HiKey, I suspect its just a bit
too far off for HiKey960.

So lets remove it for now.

Bug: 146450171
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I54221c44f2ee6af16d3772831a24c2872a6f738c