Remove v1 only REST APIs now we don't ship matrix console

changelog.d/4334.removal

@@ -0,0 +1 @@
+Remove the deprecated v1/register API on Python 2. It was never ported to Python 3.

synapse/rest/__init__.py

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from six import PY3
-
 from synapse.http.server import JsonResource
 from synapse.rest.client import versions
 from synapse.rest.client.v1 import (
@@ -56,11 +54,6 @@
     user_directory,
 )
 
-if not PY3:
-    from synapse.rest.client.v1_only import (
-        register as v1_register,
-    )
-
 
 class ClientRestResource(JsonResource):
     """A resource for version 1 of the matrix client API."""
@@ -73,10 +66,6 @@ def __init__(self, hs):
     def register_servlets(client_resource, hs):
         versions.register_servlets(client_resource)
 
-        if not PY3:
-            # "v1" (Python 2 only)
-            v1_register.register_servlets(hs, client_resource)
-
         # Deprecated in r0
         initial_sync.register_servlets(hs, client_resource)
         room.register_deprecated_servlets(hs, client_resource)