roles/common: Remove task which removes irqbalance

Prevailing wisdom is actually that this *can* help virtual hosts,
especially when the VM guest has multiple CPUs.

See: http://wiki.xen.org/wiki/Network_Throughput_and_Performance_Guide

Signed-off-by: Alan Orth <alan.orth@gmail.com>

roles/common/tasks/packages_Ubuntu.yml

@@ -42,9 +42,6 @@
     - command-not-found-data
     - python3-commandnotfound
 
-- name: Remove irqbalance
-  apt: pkg=irqbalance state=absent purge=yes
-
 - name: Configure cron-apt (config)
   copy: src=cron-apt/config dest=/etc/cron-apt/config mode=0644 owner=root group=root