authtoken: Remove deprecated signing_dir

... because the parameter was deprecated during Victoria cycle[1] and
has had no effect since then.

[1] 424b861a57

Change-Id: Id118b663523acdcf2463070ae812fbd965d61eaa

manifests/proxy/authtoken.pp

@@ -87,10 +87,6 @@
 #
 # DEPRECATED PARAMETERS
 #
-# [*signing_dir*]
-#    The cache directory for signing certificates.
-#    Defaults to undef
-#
 # [*auth_plugin*]
 #   (Optional) The plugin for authentication
 #   Defaults to undef
@@ -122,7 +118,6 @@ class swift::proxy::authtoken(
   $service_type                 = $::os_service_default,
   $interface                    = $::os_service_default,
   # DEPRECATED PARAMETERS
-  $signing_dir                  = undef,
   $auth_plugin                  = undef,
 ) inherits swift::params {
 
@@ -136,10 +131,6 @@ Please set password parameter')
     $password_real = $password
   }
 
-  if $signing_dir != undef {
-    warning('The signing_dir parameter was deprecated and has no effect')
-  }
-
   if $auth_plugin != undef {
     warning('auth_plugin is deprecated. please use auth_type instead')
     $auth_type_real = $auth_plugin

releasenotes/notes/remove-authtoken-signing_dir-989e2c10724b70fe.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    The ``swift::proxy::authtoken::signing_dir`` parameter has been removed.