remove redundant requires
remove redundant requires

based on https://github.com/voxpupuli/modulesync_config/pull/148

I got 42 rake tasks before and after the merge.

bastelfreak/puppet-zabbix,tux-o-matic/puppet-zabbix,bastelfreak/puppet-zabbix,tux-o-matic/puppet-zabbix,bastelfreak/puppet-zabbix,SoftcomInc/puppet-zabbix,tux-o-matic/puppet-zabbix,SoftcomInc/puppet-zabbix,SoftcomInc/puppet-zabbix,voxpupuli/puppet-zabbix,voxpupuli/puppet-zabbix,voxpupuli/puppet-zabbix