fixup! Remove dead code

dangerzone/isolation_provider/container.py

@@ -12,6 +12,7 @@
 from ..document import Document
 from ..util import get_tmp_dir  # NOQA : required for mocking in our tests.
 from ..util import get_resource_path, get_subprocess_startupinfo
+from .base import IsolationProvider
 
 # Define startupinfo for subprocesses
 if platform.system() == "Windows":