Remove pip_install dependency

With addition of pip_install on every node, we don't
need to have pip_install as a meta dependency.

Depends-On: If3412bb888ebb854874bbc43eb76bfcb3e4a7868
Depends-On: I79ff70c438b44753be2a93f004ebbc46de0a963d
Change-Id: I50263f33c8ebcf31ec60a3db518079040521267d

README.rst

@@ -14,5 +14,7 @@ OpenStack-Ansible Galera client
 Documentation for the project can be found at:
   https://docs.openstack.org/openstack-ansible-galera_client/latest
 
+Role dependencies and requirements are on this documentation page.
+
 The project home is at:
   http://launchpad.net/openstack-ansible

doc/source/index.rst

@@ -27,6 +27,8 @@ To use this role, define the following variables:
 Dependencies
 ~~~~~~~~~~~~
 
+This role needs pip >= 7.1 installed on the target host.
+
 This role depends on the ``config_template`` Ansible module provided
 by `OpenStack-Ansible Plugins`_.
 

meta/main.yml

@@ -41,4 +41,3 @@ dependencies:
     apt_package_pinning_file_name: "galera_client_pin.pref"
     when:
       - ansible_pkg_mgr == 'apt'
-  - pip_install