Remove installation via snap package (#4826)

Currently there is no maintainer of the snap package.
Removing the docs until new maintainer is found.
diff --git a/src/docs/src/install/index.rst b/src/docs/src/install/index.rst
index 1c20c90..7295eb3 100644
--- a/src/docs/src/install/index.rst
+++ b/src/docs/src/install/index.rst
@@ -24,7 +24,6 @@
     mac
     freebsd
     docker
-    snap
     kubernetes
     search
     nouveau
diff --git a/src/docs/src/install/snap.rst b/src/docs/src/install/snap.rst
deleted file mode 100644
index 904ce65..0000000
--- a/src/docs/src/install/snap.rst
+++ /dev/null
@@ -1,47 +0,0 @@
-.. Licensed under the Apache License, Version 2.0 (the "License"); you may not
-.. use this file except in compliance with the License. You may obtain a copy of
-.. the License at
-..
-..   http://www.apache.org/licenses/LICENSE-2.0
-..
-.. Unless required by applicable law or agreed to in writing, software
-.. distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-.. WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-.. License for the specific language governing permissions and limitations under
-.. the License.
-
-.. _install/snap:
-
-=====================
-Installation via Snap
-=====================
-
-.. highlight:: sh
-
-Apache CouchDB provides 'convenience binary' Snap builds through the
-Ubuntu snapcraft repository under the name ``couchdb``. Only snaps built
-from official stable CouchDB releases (``2.0``, ``2.1``, etc.) are available
-through this channel. There are separate snap channels for each major
-release stream, e.g. ``2.x``, ``3.x``, as well as a ``latest`` stream.
-
-After `installing snapd`_, the CouchDB snap can be installed via::
-
-    $ sudo snap install couchdb
-
-CouchDB will be installed at ``/snap/couchdb``. Data will be stored at
-``/var/snap/couchdb/``.
-
-Please note that all other file system paths are **relative to the snap
-`chroot`** instead of the system root. In addition, the exact path
-depends on your system. For example, when you normally want to
-reference `/opt/couchdb/etc/local.ini`, under snap, this could live at
-`/snap/couchdb/5/opt/couchdb/etc/local.ini`.
-
-**Your installation is not complete. Be sure to complete the**
-:ref:`Setup <setup>` **steps for a single node or clustered installation.**
-
-Further details on the snap build process are available in our
-`couchdb-pkg git repository`_.
-
-.. _installing snapd: https://snapcraft.io/docs/core/install
-.. _couchdb-pkg git repository: https://github.com/apache/couchdb-pkg