Remove out-of-context rewrite rule tip

BlueM · javiereguiluz · commit a0b19c3e372d · 2018-01-23T08:46:21.000+01:00
The `.. include:: /_includes/_rewrite_rule_tip.rst.inc` has absolutely nothing to do with the surrounding context. Having it here is confusing.
diff --git a/components/serializer.rst b/components/serializer.rst
@@ -310,8 +310,6 @@ You are now able to serialize only attributes in the groups you want::
     );
     // $obj2 = MyObj(foo: 'foo', bar: 'bar')
 
-.. include:: /_includes/_rewrite_rule_tip.rst.inc
-
 .. _ignoring-attributes-when-serializing:
 
 Ignoring Attributes
