Hi,
From the following text, it sounds like either you haven't full disabled SNMP yet.
Also this message is not created by SNMP, its created by the switch reporting on your SNMP configuration.
If you want to disable all logging to the switch console you need to enter "no logging console"
------------------------------------------------
Error Message
%IP_SNMP-3-SOCKET : can't open UDP socket
Explanation The SNMP server was unable to open a port for receiving or transmitting SNMP requests. This error usually occurs when the SNMP server is started using the snmp-server community configuration command on a router or communication server with an interface that has no IP address configured. Another possible cause is insufficient memory.
Recommended Action Configure at least one interface with an IP address or specify the no snmp-server command to remove the SNMP server process. Call your Cisco technical support representative if problems persist or if it becomes necessary to add memory.
HTH
PD