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: I0a078b6049b76e792722abb83e7d5c730aae1698

doc/source/index.rst

@@ -14,10 +14,10 @@ Default variables
    :language: yaml
    :start-after: under the License.
 
-Required variables
-~~~~~~~~~~~~~~~~~~
+Dependencies
+~~~~~~~~~~~~
 
-None
+This role needs pip >= 7.1 installed on the target host.
 
 Example playbook
 ~~~~~~~~~~~~~~~~

meta/main.yml

@@ -40,4 +40,3 @@ dependencies:
   - role: apt_package_pinning
     when:
       - ansible_pkg_mgr == 'apt'
-  - role: pip_install