Delete unsupported flag.

This library doesn't actually implement support for CLIENT_PS_MULTI_RESULTS.

Author: bgrainger

src/MySqlConnector/Serialization/HandshakeResponse41Packet.cs

@@ -14,7 +14,6 @@ private static PayloadWriter CreateCapabilitiesPayload(ProtocolCapabilities serv
 				(serverCapabilities & ProtocolCapabilities.PluginAuthLengthEncodedClientData) |
 				ProtocolCapabilities.MultiStatements |
 				ProtocolCapabilities.MultiResults |
-				ProtocolCapabilities.PreparedStatementMultiResults |
 				ProtocolCapabilities.LocalFiles |
 				(string.IsNullOrWhiteSpace(cs.Database) ? 0 : ProtocolCapabilities.ConnectWithDatabase) |
 				(cs.UseAffectedRows ? 0 : ProtocolCapabilities.FoundRows) |