Don't warn about unsupported version with SDK-based commands

This doesn't make sense: SDK (and the server) will handle this for us.

Change-Id: I31b84e09eca0dc2bc5316d6727620346ae519512
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Closes-bug: #2106760

openstackclient/compute/client.py

@@ -46,3 +46,8 @@ def build_option_parser(parser):
         % DEFAULT_API_VERSION,
     )
     return parser
+
+
+def check_api_version(check_version):
+    # SDK supports auto-negotiation for us: always return True
+    return True

openstackclient/image/client.py

@@ -46,3 +46,8 @@ def build_option_parser(parser):
         % DEFAULT_API_VERSION,
     )
     return parser
+
+
+def check_api_version(check_version):
+    # SDK supports auto-negotiation for us: always return True
+    return True

openstackclient/network/client.py

@@ -27,12 +27,6 @@ API_VERSIONS = ('2.0', '2')
 
 def make_client(instance):
     """Returns a network proxy"""
-    # NOTE(dtroyer): As of osc-lib 1.8.0 and OpenStackSDK 0.10.0 the
-    #                old Profile interface and separate client creation
-    #                for each API that uses the SDK is unnecessary.  This
-    #                callback remains as a remnant of the original plugin
-    #                interface and to avoid the code churn of changing all
-    #                of the existing references.
     LOG.debug(
         'Network client initialized using OpenStack SDK: %s',
         instance.sdk_connection.network,