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: I8b2b57c159580bf818237b58c7a72b55d4efce36

doc/source/index.rst

@@ -19,11 +19,12 @@ Default variables
   :language: yaml
   :start-after: under the License.
 
-Required variables
-~~~~~~~~~~~~~~~~~~
+Dependencies
+~~~~~~~~~~~~
 
-This list is not exhaustive at present. See role internals for further
-details.
+This role needs pip >= 7.1 installed on the target host.
+
+To use this role, define the following variables:
 
 .. code-block:: yaml
 
@@ -37,11 +38,8 @@ details.
     trove_taskmanager_rpc_encr_key:
     trove_inst_rpc_key_encr_key:
 
-
-Dependencies
-~~~~~~~~~~~~
-
-None.
+This list is not exhaustive at present. See role internals for further
+details.
 
 Example playbook
 ~~~~~~~~~~~~~~~~

meta/main.yml

@@ -20,7 +20,6 @@ galaxy_info:
    - trove
 
 dependencies:
-  - pip_install
   - role: apt_package_pinning
     when:
       - ansible_pkg_mgr == 'apt'