drm/amdgpu/vcn: remove unused code in vcn_v1_0.c

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: David (Ming Qiang) Wu <David.Wu3@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: davidwuAMD

drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c

@@ -1338,7 +1338,6 @@ static int vcn_v1_0_pause_dpg_mode(struct amdgpu_vcn_inst *vinst,
 				WREG32_SOC15(UVD, 0, mmUVD_RB_RPTR2, lower_32_bits(ring->wptr));
 				WREG32_SOC15(UVD, 0, mmUVD_RB_WPTR2, lower_32_bits(ring->wptr));
 
-				ring = &adev->vcn.inst->ring_dec;
 				WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR,
 						   RREG32_SOC15(UVD, 0, mmUVD_SCRATCH2) & 0x7FFFFFFF);
 				SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_POWER_STATUS,
@@ -1399,7 +1398,6 @@ static int vcn_v1_0_pause_dpg_mode(struct amdgpu_vcn_inst *vinst,
 				WREG32_SOC15(UVD, 0, mmUVD_JRBC_RB_CNTL,
 							UVD_JRBC_RB_CNTL__RB_RPTR_WR_EN_MASK);
 
-				ring = &adev->vcn.inst->ring_dec;
 				WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_WPTR,
 						   RREG32_SOC15(UVD, 0, mmUVD_SCRATCH2) & 0x7FFFFFFF);
 				SOC15_WAIT_ON_RREG(UVD, 0, mmUVD_POWER_STATUS,