vars: remove unused conditional import

pkgs/clan-cli/clan_cli/vars/generate.py

@@ -8,7 +8,6 @@ from dataclasses import dataclass, field
 from functools import cached_property
 from pathlib import Path
 from tempfile import TemporaryDirectory
-from typing import TYPE_CHECKING
 
 from clan_cli.completions import (
     add_dynamic_completer,
@@ -33,9 +32,6 @@ from .var import Var
 
 log = logging.getLogger(__name__)
 
-if TYPE_CHECKING:
-    from clan_lib.flake import Flake
-
 
 @dataclass(frozen=True)
 class GeneratorKey: