Remove admin.helpers.checkbox (#1972)

Author: q0w

django-stubs/contrib/admin/helpers.pyi

@@ -19,8 +19,6 @@ class ActionForm(forms.Form):
     action: Any
     select_across: Any
 
-checkbox: Any
-
 @type_check_only
 class _PrepopulatedDict(TypedDict):
     field: BoundField

scripts/stubtest/allowlist_todo_django50.txt

@@ -28,7 +28,6 @@ django.contrib.admin.filters.EmptyFieldListFilter.get_lookup_condition
 django.contrib.admin.filters.FacetsMixin
 django.contrib.admin.filters.RelatedFieldListFilter.get_facet_counts
 django.contrib.admin.filters.SimpleListFilter.get_facet_counts
-django.contrib.admin.helpers.checkbox
 django.contrib.admin.options.BaseModelAdmin.lookup_allowed
 django.contrib.admin.options.IS_FACETS_VAR
 django.contrib.admin.sites.AdminSite.get_model_admin