remove dstat from the virthost

Monitoring the performance of the virthost is no
buying us anything. It's also not used afaict.

Change-Id: Iee4ad5582acb91f6133c6f32ddc9da99b9d78aa9

roles/environment/setup/tasks/main.yml

@@ -98,25 +98,6 @@
   with_items: "{{ networks }}"
   become: true
 
-- name: install the latest version of dstat on virthost
-  package:
-    name: dstat
-    state: present
-  become: true
-
-- name: Prepare directory with extra logs
-  file: dest=/var/log/extra state=directory
-  become: true
-
-- name: Run dstat for collecting metrics during 2 hours on virthost
-  command: >
-    dstat -tcmndrylpg --nocolor --output /var/log/extra/dstat-csv.log 1 7200 \
-    >/dev/null
-  async: 7200
-  poll: 0
-  become: true
-  changed_when: false
-
 # We're going to want to store things in `working_dir` so ensure it
 # exists first.  `working_dir` is a directory on the target host.
 - name: Ensure remote working dir exists