fix: resolve typecheck issues in special commands

Author: amjith

litecli/packages/special/dbcommands.py

@@ -254,7 +254,6 @@ def load_extension(cur: DBCursor, arg: str, **_: Any) -> None:
     conn = cur.connection
     conn.enable_load_extension(True)
     conn.load_extension(path)
-    return [(None, None, None, "")]
 
 
 @special_command(

tests/utils.py

@@ -21,7 +21,7 @@
 
 
 def db_connection(dbname=":memory:"):
-    conn = sqlite3.connect(database=dbname, isolation_level=None)  # type: ignore[attr-defined]
+    conn = sqlite3.connect(database=dbname, isolation_level=None)
     return conn