Revert "ramdisk: automatically enable dual-sim features on V811W"

But not all devices with ro.boot.hwversion=wmfA.6 are dual-SIM. This
means there's no intelligent way to identify different variants.
Fuck you ZTE!

This reverts commit c5d21bad69f8ef25579ad25ae41ffd55876ce0e6.

Change-Id: I403fd001fd24bc0369a17e2e6115896a7d1dc687