amdgpu/dc: drop dc_ver char

This isn't referenced anywhere, and if it was it should be const.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -49,8 +49,6 @@
 #include "mem_input.h"
 
 
-char dc_ver[] = DC_VER;
-
 /*******************************************************************************
  * Private functions
  ******************************************************************************/