drm/amd/display: Remove legacy code

[Why & How]
Remove legacy code which is unnecessary.
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/resource/dcn314/dcn314_resource.c

@@ -929,24 +929,6 @@ static const struct dc_debug_options debug_defaults_drv = {
 	.using_dml2 = false,
 };
 
-static const struct dc_debug_options debug_defaults_diags = {
-	.disable_dmcu = true,
-	.force_abm_enable = false,
-	.timing_trace = true,
-	.clock_trace = true,
-	.disable_dpp_power_gate = true,
-	.disable_hubp_power_gate = true,
-	.disable_clock_gate = true,
-	.disable_pplib_clock_request = true,
-	.disable_pplib_wm_range = true,
-	.disable_stutter = false,
-	.scl_reset_length10 = true,
-	.dwb_fi_phase = -1, // -1 = disable
-	.dmub_command_table = true,
-	.enable_tri_buf = true,
-	.use_max_lb = true
-};
-
 static const struct dc_panel_config panel_config_defaults = {
 	.psr = {
 		.disable_psr = false,
@@ -1939,8 +1921,6 @@ static bool dcn314_resource_construct(
 
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
-	else
-		dc->debug = debug_defaults_diags;
 
 	/* Disable pipe power gating */
 	dc->debug.disable_dpp_power_gate = true;