Removing duplicated tasks

Generate subunit files is the same task as Generate
testrepository.subunit file, so we are executing the same task twice
basically. Removing the Generate subunit in favor of
testrepository.subunit because testrepository is used to feed
openstack-health

Change-Id: I0834618254aa6712bdbc4d036a89ca718b258e6f

roles/validate-tempest/tasks/tempest-results.yml

@@ -1,16 +1,4 @@
 ---
-- name: Generate subunit results file
-  shell: |
-    find '{{ working_dir }}/tempest/.testrepository/' -regex '.*/[0-9]+' \
-    | while read name; do cat "$name"; done \
-    > '{{ working_dir }}/tempest/results.subunit'
-
-- name: Fetch subunit results
-  fetch:
-    src: "{{ working_dir }}/tempest/results.subunit"
-    dest: "{{ lookup('env', 'PWD') }}/results.subunit"
-    flat: yes
-
 - ignore_errors: true
   block:
     - name: Generate testrepository.subunit results file