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: I5a953e17787b36b58b831a3d704cd8f51f2078df

doc/source/index.rst

@@ -22,11 +22,12 @@ Default variables
    :start-after: under the License.
 
 
-Required variables
+Dependencies
-~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~
 
-This list is not exhaustive. See role internals for further
+This role needs pip >= 7.1 installed on the target host.
-details.
+
+To use this role, define the following variables:
 
 .. code-block:: yaml
 
@@ -34,6 +35,8 @@ details.
       horizon_container_mysql_password: "SuperSecrete"
       horizon_secret_key: "SuperSecreteHorizonKey"
 
+This list is not exhaustive. See role internals for further
+details.
 
 Example playbook
 ~~~~~~~~~~~~~~~~

meta/main.yml

@@ -38,7 +38,6 @@ galaxy_info:
     - development
     - openstack
 dependencies:
-  - pip_install
   - role: apt_package_pinning
     when:
       - ansible_pkg_mgr == 'apt'