remove some unused properties

Dapper/SqlMapper.cs

@@ -86,17 +86,12 @@ private static DbType LookupDbType(Type type)
         private class Identity : IEquatable<Identity>
         {
 
-            public String ConnectionString { get { return connectionString; } }
-            public Type Type { get { return type; } }
-            public string Sql { get { return sql; } }
-            public Type ParametersType { get { return ParametersType; } }
             internal Identity(string sql, IDbConnection cnn, Type type, Type parametersType, Type[] otherTypes = null)
             {
                 this.sql = sql;
                 this.connectionString = cnn.ConnectionString;
                 this.type = type;
                 this.parametersType = parametersType;
-                this.otherTypes = otherTypes;
                 unchecked
                 {
                     hashCode = 17; // we *know* we are using this in a dictionary, so pre-compute this
@@ -120,7 +115,6 @@ public override bool Equals(object obj)
             private readonly string sql;
             private readonly int hashCode;
             private readonly Type type;
-            private readonly Type[] otherTypes;
             private readonly string connectionString;
             private readonly Type parametersType; 
             public override int GetHashCode()