Removed unused namespaces

Author: codeapologist

src/DataAbstractions.Dapper/DataAccessor.Dapper.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Data;
-using System.Data.SqlClient;
 using System.Threading.Tasks;
 using Dapper;
 

src/DataAbstractions.Dapper/IDataAccessor.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Data;
-using System.Data.SqlClient;
 using System.Threading.Tasks;
 using Dapper;