removed zbxapi workaround as it's no longer needed

roles/docker_img_monitoring/files/monitoring_container/Dockerfile

@@ -12,10 +12,6 @@ RUN yum -y install ruby193-rubygem-zbxapi cronie zabbix-sender ruby openshift-or
 # Setup ctr-ipc dir
 RUN ln -s /shared/var/run/ctr-ipc /var/run/ctr-ipc
 
-# TEMP WORKAROUND: until zbxapi rpm is updated to work with zbx 2.4
-RUN ruby -i -ane 'if $_ =~ /APIInfo.version/ ; puts "    @major,@minor=2,0" ; else puts $_ ; end' /opt/rh/ruby193/root/usr/share/gems/gems/zbxapi-0.3.3/zbxapi.rb
-
-
 # Container specific files
 ADD start.rb /start.rb
 ADD register-with-zabbix.rb /register-with-zabbix.rb