amdgpu/dc: remove redundant assignment to variable 'option'

The variable option is being initialized with a value that is
never read and it is being updated later with a new value.  The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce110/dce110_opp_csc_v.c

@@ -679,8 +679,7 @@ void dce110_opp_v_set_csc_default(
 	if (default_adjust->force_hw_default == false) {
 		const struct out_csc_color_matrix *elm;
 		/* currently parameter not in use */
-		enum grph_color_adjust_option option =
-			GRPH_COLOR_MATRIX_HW_DEFAULT;
+		enum grph_color_adjust_option option;
 		uint32_t i;
 		/*
 		 * HW default false we program locally defined matrix