drm/i915/dg2: Drop Wa_22014600077

This workaround has been dropped from all DG2 variants in the latest
workaround database update.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231127190043.4099109-2-matthew.d.roper@intel.com