drm/amd/display: Remove power gating debug flags

They're not used anywhere
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc.h

@@ -145,8 +145,6 @@ struct dc_debug {
 	bool disable_stutter;
 	bool disable_dcc;
 	bool disable_dfs_bypass;
-	bool disable_dpp_power_gate;
-	bool disable_hubp_power_gate;
 	bool disable_clock_gate;
 	bool disable_dmcu;
 	bool disable_color_module;