Drop pip-conf-removal task

This task was essential for migration from R->S as we were
migrtating from usage of wheels stored on repo server to
usage of python_venv_build role. This task is not relevant now
and can be dropped. Moreover it makes upgrade script re-run fail
during S->T upgrade when upgrade playbook failed first time before
finishing setup_hosts playbook (creating all required containers).

Change-Id: Ice98040e529f21c7369df45b020b284c959d9c8c

scripts/run-upgrade.sh

@@ -168,7 +168,6 @@ function main {
     bootstrap_ansible
 
     pushd ${MAIN_PATH}/playbooks
-        RUN_TASKS+=("${SCRIPTS_PATH}/upgrade-utilities/pip-conf-removal.yml")
         RUN_TASKS+=("${SCRIPTS_PATH}/upgrade-utilities/deploy-config-changes.yml")
         # we don't want to trigger container restarts for galera and rabbit
         # but as there will be no hosts available for metal deployments,

scripts/upgrade-utilities/pip-conf-removal.yml

@@ -1,23 +0,0 @@
-# Copyright 2015, Rackspace US, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-- name: Remove pip.conf if found
-  hosts: all
-  gather_facts: true
-  user: root
-  tasks:
-    - name: Remove pip.conf
-      file:
-        path: "{{ ansible_env.HOME }}/.pip/pip.conf"
-        state: "absent"