drm/amd/display: Remove unused integer

Integer no longer needed.
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@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/dc.h

@@ -423,7 +423,6 @@ struct dc_clocks {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	enum dcn_zstate_support_state zstate_support;
 	bool dtbclk_en;
-	int dtbclk_khz;
 #endif
 	enum dcn_pwr_state pwr_state;
 	/*