Avoid runtime ParamType subscription

src/flask/cli.py

@@ -7,7 +7,6 @@ import inspect
 import os
 import platform
 import re
-import ssl
 import sys
 import traceback
 import typing as t
@@ -26,6 +25,8 @@ from .helpers import get_debug_flag
 from .helpers import get_load_dotenv
 
 if t.TYPE_CHECKING:
+    import ssl
+
     from _typeshed.wsgi import StartResponse
     from _typeshed.wsgi import WSGIApplication
     from _typeshed.wsgi import WSGIEnvironment
@@ -776,7 +777,7 @@ def show_server_banner(debug: bool, app_import_path: str | None) -> None:
         click.echo(f" * Debug mode: {'on' if debug else 'off'}")
 
 
-class CertParamType(click.ParamType[str | os.PathLike[str] | ssl.SSLContext]):
+class CertParamType(click.ParamType):
     """Click option type for the ``--cert`` option. Allows either an
     existing file, the string ``'adhoc'``, or an import for a
     :class:`~ssl.SSLContext` object.