Remove version checks

openstacksdk 1.0.0 was released 3½ years ago [1]. pip is not going to
pull that version any more. These checks are redundant.

In addition, we can remove sdk_version extra var. Change
I9665f04e6c0d5a84d6c20a73ef7b0dfdc7bd8159 removed the last guard that
relied on this, similarly about 3½ years ago.

[1] https://pypi.org/project/openstacksdk/1.0.0/

Change-Id: Ic0dd7bc5de1f24d1ee3336ccea97aced850f86af
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

plugins/inventory/openstack.py

@@ -155,9 +155,6 @@ import sys
 
 from ansible.errors import AnsibleParserError
 from ansible.plugins.inventory import BaseInventoryPlugin, Constructable, Cacheable
-from ansible_collections.openstack.cloud.plugins.module_utils.openstack import (
-    ensure_compatibility
-)
 
 try:
     import openstack
@@ -179,12 +176,6 @@ class InventoryModule(BaseInventoryPlugin, Constructable, Cacheable):
             raise AnsibleParserError(
                 'Could not import Python library openstacksdk')
 
-        try:
-            ensure_compatibility(openstack.version.__version__)
-        except ImportError as e:
-            raise AnsibleParserError(
-                'Incompatible openstacksdk library found: {0}'.format(e))
-
         # Redirect logging to stderr so it does not mix with output, in
         # particular JSON output of ansible-inventory.
         # TODO: Integrate openstack's logging with Ansible's logging.