Apply suggestion from @Daverball

revert this

Co-authored-by: David Salvisberg <david.salvisberg@seantis.ch>

Author: Tschuppi81

src/onegov/form/validators.py

@@ -128,18 +128,7 @@ def __call__(self, form: Form, field: Field) -> None:
             for data in field.data:
                 if not data:
                     continue  # in case of file deletion
-
-                self.validate_file_size_limit(field, data)
-
-        else:
-            self.validate_file_size_limit(field, field.data)
-
-    def validate_file_size_limit(
-        self,
-        field: Field,
-        data: dict[Any, Any]
-    ) -> None:
-        if data.get('size', 0) > self.max_bytes:
+        if field.data.get('size', 0) > self.max_bytes:
             message = field.gettext(self.message).format(
                 humanize.naturalsize(self.max_bytes)
             )