Breaking: Remove support for document and thumbnail encryption (#11850)

src/documents/__init__.py

@@ -1,5 +1,4 @@
 # this is here so that django finds the checks.
-from documents.checks import changed_password_check
 from documents.checks import parser_check
 
-__all__ = ["changed_password_check", "parser_check"]
+__all__ = ["parser_check"]