Fix the bug with removing fields_elem from a wrong parent

Author: mysticfall

bpystubgen/directives.py

@@ -130,7 +130,7 @@ def parse_docstring(self) -> DocStringInfo:
 
                     fields[f_name.astext().strip()] = f_body.astext().strip()
 
-                docstring.remove(fields_elem)
+                fields_elem.parent.remove(fields_elem)
             except StopIteration:
                 pass