Remove version method.

database.py

@@ -2,15 +2,12 @@ from typing import TypeVar
 import logging
 from collections import namedtuple
 
-# from .cursor import AsyncLoggingCursor
 from .registry import Registry
 from .connector import Connector
 
 
 logger = logging.getLogger(__name__)
 
-Version = namedtuple('Version', ('version', 'time', 'author'))
-
 T = TypeVar('T', bound=Registry)
 
 
@@ -30,18 +27,3 @@ class Database(Connector):
         registry.bind(self)
         self.registries[registry.name] = registry
         return registry
-
-    async def version(self) -> Version:
-        """
-        Return the current schema version as a Version namedtuple.
-        """
-        async with self.connection() as conn:
-            async with conn.cursor() as cursor:
-                # Get last entry in version table, compare against desired version
-                await cursor.execute("SELECT * FROM VersionHistory ORDER BY time DESC LIMIT 1")
-                row = await cursor.fetchone()
-                if row:
-                    return Version(row['version'], row['time'], row['author'])
-                else:
-                    # No versions in the database
-                    return Version(-1, None, None)