Revert "hwc: Blank and unblank primary on first boot"

Fixed in the device tree instead.

This reverts commit 163f374e298e24cfbf842d7d33c455c5e8c9fa0a.

Change-Id: I53d026700b0b046a7ff4b180d802be6e599a9e85
Merge "Revert "hwc: Blank and unblank primary on first boot"" into kk44