Revert "BACKPORT: drm: Parse HDR metadata info from EDID"

This reverts commit 1e98c115.

Revert most of this change. We only need the #define.

Bug: 152417756
Signed-off-by: Alistair Delva <adelva@google.com>
Change-Id: I6978ee67314f64e92e22a051f85863c1a440f9f1