diff --git a/src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Query.cs b/src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Query.cs
index 1a46d5e1..120f4454 100644
--- a/src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Query.cs
+++ b/src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Query.cs
@@ -135,12 +135,6 @@ namespace Microsoft.SqlTools.ServiceLayer.QueryExecution
         /// <param name="q">The query that completed</param>
         public delegate Task QueryAsyncEventHandler(Query q);
 
-        /// <summary>
-        /// Delegate type for callback when a query connection fails
-        /// </summary>
-        /// <param name="message">Message to return</param>
-        public delegate Task QueryAsyncErrorEventHandler(string message);
-
         /// <summary>
         /// The batches underneath this query
         /// </summary>