Several SNMP templates has versioning from times prior to v5, when then SNMP version specific configuration was still carried by the ITEM.
As of v5, this is no longer valid and I believe, that those which have "v1" & "v2" variants could be reduced.

now:

Template Module Generic SNMPv1
Template Module Generic SNMPv2

Template Module Linux CPU SNMPv2

after:

Template Module Generic SNMP

Template Module Linux CPU SNMP