Fix slot definitions for meta pass in HD PBR subshader

com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDPBRSubShader.cs

                 PBRMasterNode.AlphaSlotId,
                 PBRMasterNode.AlphaThresholdSlotId
             },
-//             VertexShaderSlots = new List<int>()
-//             {
-//                 PBRMasterNode.PositionSlotId
-//             }
+            VertexShaderSlots = new List<int>()
+            {
+                //PBRMasterNode.PositionSlotId
+            }
         };
 
         Pass m_PassShadowCaster = new Pass()

com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDUnlitSubShader.cs

             },
             VertexShaderSlots = new List<int>()
             {
-                PBRMasterNode.PositionSlotId
+                //PBRMasterNode.PositionSlotId
             }
         };