Like WTF Microsoft. SNMP is deprecated in Windows Server 2012. The same goes for other useful protocols like for instance SNMP or what about 32-bit ODBC database connections. There is a complete list published with removed features and roles found here.
Deprecated does not mean removed (yet), but this should be seriously taking into concern when you’re in the planning phase of updating your servers. And since Windows Server 2012 is quite the same as Windows 8 this can come as a surprise for you.