Remove ipa_hostname fact

... because it was used only by novajoin support which was removed
multiple cycles ago.

Change-Id: Icb80618901825b896e360872dbbf29685f896448
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

lib/facter/ipa_hostname.rb

@@ -1,8 +0,0 @@
-Facter.add(:ipa_hostname) do
-  confine kernel: 'Linux'
-  setcode do
-    if File.exist?('/etc/ipa/default.conf')
-      Facter::Util::Resolution.exec('grep xmlrpc_uri /etc/ipa/default.conf | cut -d/ -f3')
-    end
-  end
-end

releasenotes/notes/remove-ipa_hostname-6b7a75a770e1d940.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    The ``ipa_hostname`` fact has been removed. This was used by novajoin
+    support which was already removed.