Revert "displaycolor: Add support for external display to displa..."

Revert submission 25035359-hwc-displaycolor-ext-display

Reason for revert: DroidMonitor-triggered revert due to breakage b/306074705

Reverted changes: /q/submissionid:25035359-hwc-displaycolor-ext-display

Change-Id: I2c32434b7be9f19741720178e42cca66fab0b10a
1 file changed