docs: revert change. Not needed.

rouilj · rouilj · commit 49ad5c2fb9c4 · 2024-06-05T09:35:49.000-04:00
diff --git a/doc/license.txt b/doc/license.txt
@@ -2,7 +2,7 @@ License
 =======
 
 Roundup is Free Software under the following license (from the
-`file COPYING.txt <../COPYING.html>` in the software distribution):
+file COPYING.txt in the software distribution):
 
 .. raw:: html
 
