Remove [compute-feature-enabled] vnc_server_header

This option was deprecated some years back[1], and has had no effect
since the 22.0.0 release.

[1] fd01d15d144caa4d5a482301d05cf724c75c4500

Change-Id: Ib2ac35eec958153e139f2fcfee05c2d6aeb56e81
diff --git a/releasenotes/notes/remove-vnc-server-header-1a9731ba10242603.yaml b/releasenotes/notes/remove-vnc-server-header-1a9731ba10242603.yaml
new file mode 100644
index 0000000..cf14513
--- /dev/null
+++ b/releasenotes/notes/remove-vnc-server-header-1a9731ba10242603.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    The deprecated ``[compute-feature-enabled] vnc_server_header`` option has
+    been removed.
diff --git a/tempest/config.py b/tempest/config.py
index a27c987..c686ba9 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -511,15 +511,6 @@
                 default=False,
                 help='Enable VNC console. This configuration value should '
                      'be same as nova.conf: vnc.enabled'),
-    cfg.StrOpt('vnc_server_header',
-               default='WebSockify',
-               help='Expected VNC server name (WebSockify, nginx, etc) '
-                    'in response header.',
-               deprecated_for_removal=True,
-               deprecated_reason='This option will be ignored because the '
-                                 'usage of different response header fields '
-                                 'to accomplish the same goal (in accordance '
-                                 'with RFC7231 S6.2.2) makes it obsolete.'),
     cfg.BoolOpt('spice_console',
                 default=False,
                 help='Enable Spice console. This configuration value should '