DOC: remove references to the outdated architecture.txt

As mentionned in bug #405 we continue to reference architecture.txt from
places in the doc despite this file not being packaged for many years.
Better drop the reference if it's confusing.

diff --git a/doc/intro.txt b/doc/intro.txt
index 48a3bfa35bc772ce678c73c9c88c2c0234884497..bda6dc1bfe7c280b831229a6fd915421c9de3352 100644 (file)
--- a/doc/intro.txt
+++ b/doc/intro.txt
@@ -85,9 +85,6 @@ to the mailing list whose responses are present in these documents.
   - configuration.txt : the reference manual details all configuration keywords
     and their options. It is used when a configuration change is needed.
 
-  - architecture.txt : the architecture manual explains how to best architect a
-    load-balanced infrastructure and how to interact with third party products.
-
   - coding-style.txt : this is for developers who want to propose some code to
     the project. It explains the style to adopt for the code. It is not very
     strict and not all the code base completely respects it, but contributions