drm/amd/amdgpu: Drop commented out stub function

Drop the function gmc_v6_0_init_compute_vmid() since it wasn't
implemented and commented out.
Signed-off-by: NTom St Denis <tom.stdenis@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c

@@ -1309,11 +1309,6 @@ static void gfx_v6_0_setup_rb(struct amdgpu_device *adev)
 	gfx_v6_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
 	mutex_unlock(&adev->grbm_idx_mutex);
 }
-/*
-static void gmc_v6_0_init_compute_vmid(struct amdgpu_device *adev)
-{
-}
-*/
 
 static void gfx_v6_0_set_user_cu_inactive_bitmap(struct amdgpu_device *adev,
 						 u32 bitmap)