doc: remove uWSGI references as it is in maint mode and not being updated

Replaced with Waitress where appropriate.

Author: rouilj

doc/admin_guide.txt

@@ -738,7 +738,7 @@ on the fly, compression is enabled by default, to disable it set::
     dynamic_compression = No
 
 in the tracker's ``config.ini``. You should disable compression if
-your proxy (e.g. nginx or apache) or wsgi server (uwsgi) is configured
+your proxy (e.g. nginx or apache) is configured
 to compress responses on the fly. The python standard library includes
 gzip support. For brotli or zstd you will need to install packages. See
 the `installation documentation`_ for details.
@@ -900,9 +900,9 @@ There are two ways to add a CSP:
 Fixed CSP
 ---------
 
-If you are using a web server (Apache, Nginx) to run Roundup, you can
-add a ``Content-Security-Policy`` header using that server. WSGI
-servers like uWSGI can also be configured to add headers.  An example
+If you are using a web server (Apache, Nginx) to run Roundup, you
+can add a ``Content-Security-Policy`` header using that
+server. WSGI middleware can be written to add headers.  An example
 header would look like::
 
   Content-Security-Policy: default-src 'self' 'unsafe-inline' 'strict-dynamic';

doc/installation.txt

@@ -1283,7 +1283,7 @@ FastCGI (Cherokee, Hiawatha, lighttpd)
 
 The Hiawatha and lighttpd web servers can run Roundup using FastCGI.
 Cherokee can run FastCGI but it also supports wsgi directly using a
-wsgi server like uWSGI, Gnuicorn etc.
+wsgi server like Waitress, Gnuicorn etc.
 
 To run Roundup using FastCGI, the flup_ package can be used under
 Python 2 and Python 3. We don't have a detailed config for this, but
@@ -1499,23 +1499,6 @@ including putting it behind a proxy, IPV6 support etc.
 .. _`See the Waitress docs`:
    https://docs.pylonsproject.org/projects/waitress/en/stable/
 
-.. index:: pair: web interface; uWSGI
-   single: wsgi; uWSGI
-
-uWSGI Installation
-~~~~~~~~~~~~~~~~~~
-
-For a basic roundup install using uWSGI behind a front end server,
-install uwsgi and the python3 (or python) plugin. Then run::
-
-   uwsgi --http-socket 127.0.0.1:8917 \
-       --plugin python3 --mount=/tracker=wsgi.py \
-       --manage-script-name --callable app
-
-using the same wsgi.py as was used for Gunicorn. If you get path not
-found errors, check the mount option. The /tracker entry must match
-the path used for the [tracker] web value in the tracker's config.ini.
-
 Configure an Email Interface
 ============================