Remove support for /os-floating-ip-dns REST API

Drop support for the os-floating-ip-dns API which has been deprecated
since Newton:

  Idca478c566f9a7b5b30a3172453ce7c66d9fd8f0

This API now returns a 410 response for all routes.

Unit tests are removed and the functional API sample tests are just
asserting the 410 response now.

The API sample docs are left intact since the API reference still builds
from those and can be considered more or less branchless, so people
looking at the API reference can apply it to older deployments of nova
before os-floating-ip-dns was removed.

The release note added for previous nova-network API removals is
amended to note this additional change.

Part of blueprint remove-nova-network

Change-Id: I0c4b586292814b8483226aee315f41cbefc86a1e

api-ref/source/index.rst

@@ -60,7 +60,6 @@ the `API guide <http://developer.openstack.org/api-guide/compute/index.html>`_.
 .. include:: images.inc
 .. include:: os-baremetal-nodes.inc
 .. include:: os-tenant-network.inc
-.. include:: os-floating-ip-dns.inc
 .. include:: os-floating-ip-pools.inc
 .. include:: os-floating-ips.inc
 .. include:: os-security-groups.inc
@@ -81,3 +80,4 @@ Compute API in the past, but no longer exist.
 .. include:: os-virtual-interfaces.inc
 .. include:: os-fixed-ips.inc
 .. include:: os-floating-ips-bulk.inc
+.. include:: os-floating-ip-dns.inc

api-ref/source/os-floating-ip-dns.inc

@@ -11,11 +11,12 @@
 
    Since these APIs are only implemented for **nova-network**, they are
    deprecated. These will fail with a 404 starting from microversion 2.36.
+   They were removed in the 18.0.0 Rocky release.
 
 Manages DNS records associated with floating IP addresses. The API
 dispatches requests to a DNS driver that is selected at startup.
 
-List Dns Domains
+List DNS Domains
 ================
 
 .. rest_method:: GET /os-floating-ip-dns
@@ -24,7 +25,8 @@ Lists registered DNS domains published by the DNS drivers.
 
 Normal response codes: 200
 
-Error response codes: unauthorized(401), forbidden(403), notImplemented(501)
+Error response codes: unauthorized(401), forbidden(403), gone(410),
+notImplemented(501)
 
 Response
 --------
@@ -34,7 +36,7 @@ Response
 .. literalinclude:: ../../doc/api_samples/os-floating-ip-dns/floating-ip-dns-list-resp.json
    :language: javascript
 
-Create Or Update Dns Domain
+Create Or Update DNS Domain
 ===========================
 
 .. rest_method:: PUT /os-floating-ip-dns/{domain}
@@ -43,8 +45,8 @@ Creates or updates a DNS domain.
 
 Normal response codes: 200
 
-Error response codes: badRequest(400), unauthorized(401),
-forbidden(403), notImplemented(501)
+Error response codes: badRequest(400), unauthorized(401), forbidden(403),
+gone(410), notImplemented(501)
 
 Request
 -------
@@ -66,7 +68,7 @@ Response
 .. literalinclude:: ../../doc/api_samples/os-floating-ip-dns/floating-ip-dns-create-or-update-resp.json
    :language: javascript
 
-Delete Dns Domain
+Delete DNS Domain
 =================
 
 .. rest_method:: DELETE /os-floating-ip-dns/{domain}
@@ -75,8 +77,8 @@ Deletes a DNS domain and all associated host entries.
 
 Normal response codes: 202
 
-Error response codes: unauthorized(401), forbidden(403),
-itemNotFound(404), notImplemented(501)
+Error response codes: unauthorized(401), forbidden(403), itemNotFound(404),
+gone(410), notImplemented(501)
 
 Request
 -------
@@ -88,7 +90,7 @@ Request
 Response
 --------
 
-List Dns Entries
+List DNS Entries
 ================
 
 .. rest_method:: GET /os-floating-ip-dns/{domain}/entries/{ip}
@@ -97,8 +99,8 @@ Lists DNS entries for a domain and IP.
 
 Normal response codes: 200
 
-Error response codes: unauthorized(401), forbidden(403),
-itemNotFound(404), notImplemented(501)
+Error response codes: unauthorized(401), forbidden(403), itemNotFound(404),
+gone(410), notImplemented(501)
 
 Request
 -------
@@ -111,12 +113,12 @@ Request
 Response
 --------
 
-**Example List Dns Entries: JSON response**
+**Example List DNS Entries: JSON response**
 
 .. literalinclude:: ../../doc/api_samples/os-floating-ip-dns/floating-ip-dns-entry-list-resp.json
    :language: javascript
 
-Find Unique Dns Entry
+Find Unique DNS Entry
 =====================
 
 .. rest_method:: GET /os-floating-ip-dns/{domain}/entries/{name}
@@ -125,8 +127,8 @@ Finds a unique DNS entry for a domain and name.
 
 Normal response codes: 200
 
-Error response codes: unauthorized(401), forbidden(403),
-itemNotFound(404), notImplemented(501)
+Error response codes: unauthorized(401), forbidden(403), itemNotFound(404),
+gone(410), notImplemented(501)
 
 Request
 -------
@@ -139,12 +141,12 @@ Request
 Response
 --------
 
-**Example Find Unique Dns Entry: JSON response**
+**Example Find Unique DNS Entry: JSON response**
 
 .. literalinclude:: ../../doc/api_samples/os-floating-ip-dns/floating-ip-dns-entry-get-resp.json
    :language: javascript
 
-Create Or Update Dns Entry
+Create Or Update DNS Entry
 ==========================
 
 .. rest_method:: PUT /os-floating-ip-dns/{domain}/entries/{name}
@@ -153,7 +155,8 @@ Creates or updates a DNS entry.
 
 Normal response codes: 200
 
-Error response codes: unauthorized(401), forbidden(403), notImplemented(501)
+Error response codes: unauthorized(401), forbidden(403), gone(410),
+notImplemented(501)
 
 Request
 -------
@@ -163,20 +166,20 @@ Request
   - domain: domain
   - name: name
 
-**Example Create Or Update Dns Entry: JSON request**
+**Example Create Or Update DNS Entry: JSON request**
 
 .. literalinclude:: ../../doc/api_samples/os-floating-ip-dns/floating-ip-dns-create-or-update-entry-req.json
    :language: javascript
 
 Response
 --------
 
-**Example Create Or Update Dns Entry: JSON response**
+**Example Create Or Update DNS Entry: JSON response**
 
 .. literalinclude:: ../../doc/api_samples/os-floating-ip-dns/floating-ip-dns-create-or-update-entry-resp.json
    :language: javascript
 
-Delete Dns Entry
+Delete DNS Entry
 ================
 
 .. rest_method:: DELETE /os-floating-ip-dns/{domain}/entries/{name}
@@ -185,8 +188,8 @@ Deletes a DNS entry.
 
 Normal response codes: 202
 
-Error response codes: unauthorized(401), forbidden(403),
-itemNotFound(404), notImplemented(501)
+Error response codes: unauthorized(401), forbidden(403), itemNotFound(404),
+gone(410), notImplemented(501)
 
 Request
 -------