✏️ Remove unused defaults

docs/oop/inheritance.rst

@@ -40,7 +40,7 @@ Python, this technique looks like this:
     :linenos:
 
     >>> class Form:
-    ...     def __init__(self, x=0, y=0):
+    ...     def __init__(self, x, y):
     ...         self.x = x
     ...         self.y = y
     ...