Steps to reproduce:

1. Updating zabbix-agent2 using package zabbix-agent2-6.0.10-release1  - all ok - worked fine at yesterday.
2. Today, updating the zabbix-agent2 using package zabbix-agent2-6.0.10-release2 - now is mandatory install the zabbix-agent2-plugin-postgresql and zabbix-agent2-plugin-mongodb - even unused.

Result:

Zabbix-agent2 not updated - need install dependencies not used.

---> package zabbix-agent2.x86_64 0:6.0.10-release1.el7 will be updated
---> package zabbix-agent2.x86_64 0:6.0.10-release2.el7 will be an update
--> processing dependency: zabbix-agent2-plugin-postgresql for the package: zabbix-agent2-6.0.10-release2.el7.x86_64
--> Processing dependency: zabbix-agent2-plugin-mongodb for the package: zabbix-agent2-6.0.10-release2.el7.x86_64
--> Completed dependency resolution
Error: package: zabbix-agent2-6.0.10-release2.el7.x86_64
           Needs: zabbix-agent2-plugin-postgresql
Error: package: zabbix-agent2-6.0.10-release2.el7.x86_64
           Needs: zabbix-agent2-plugin-mongodb

Expected:

I think it shouldn't be necessary to install unused packages.

Update zabbix-agent2 without need install zabbix-agent2-plugin-postgresql and zabbix-agent2-plugin-mongodb.