Revert "amd/common: add vcn dec ip info query"

This reverts commit 524d4fff9e.

This commit breaks amdgpu on kernels with no DEC IP support.

Caught by the airlied CI system.

src/amd/common/ac_gpu_info.c

@@ -88,7 +88,7 @@ bool ac_query_gpu_info(int fd, amdgpu_device_handle dev,
 {
 	struct amdgpu_buffer_size_alignments alignment_info = {};
 	struct amdgpu_heap_info vram, vram_vis, gtt;
-	struct drm_amdgpu_info_hw_ip dma = {}, compute = {}, uvd = {}, vce = {}, vcn_dec = {};
+	struct drm_amdgpu_info_hw_ip dma = {}, compute = {}, uvd = {}, vce = {};
 	uint32_t vce_version = 0, vce_feature = 0, uvd_version = 0, uvd_feature = 0;
 	uint32_t unused_feature;
 	int r, i, j;
@@ -157,12 +157,6 @@ bool ac_query_gpu_info(int fd, amdgpu_device_handle dev,
 		return false;
 	}
 
-	r = amdgpu_query_hw_ip_info(dev, AMDGPU_HW_IP_VCN_DEC, 0, &vcn_dec);
-	if (r) {
-		fprintf(stderr, "amdgpu: amdgpu_query_hw_ip_info(vcn_dec) failed.\n");
-		return false;
-	}
-
 	r = amdgpu_query_firmware_version(dev, AMDGPU_INFO_FW_GFX_ME, 0, 0,
 					&info->me_fw_version, &unused_feature);
 	if (r) {