Remove mention of defunct file.
Misc/COPYRIGHT was renamed twelve years ago to LICENSE and later copied
to the main docs, to which there is already a link.
diff --git a/Doc/howto/advocacy.rst b/Doc/howto/advocacy.rst
index e67e201..2969d26 100644
--- a/Doc/howto/advocacy.rst
+++ b/Doc/howto/advocacy.rst
@@ -264,8 +264,7 @@
**What are the restrictions on Python's use?**
-They're practically nonexistent. Consult the :file:`Misc/COPYRIGHT` file in the
-source distribution, or the section :ref:`history-and-license` for the full
+They're practically nonexistent. Consult :ref:`history-and-license` for the full
language, but it boils down to three conditions:
* You have to leave the copyright notice on the software; if you don't include