Remove all first-boot.d references

first-boot.d has been deprecated for two releases so is about
time to remove any references to it.

Change-Id: Id8415447592be9fb3fd009dc528aed3c42b6095d

README.md

@@ -47,7 +47,6 @@ In a running OpenStack there are several categories of config.
 We have five places we can do configuration in TripleO:
  - image build time
  - in-instance heat-driven (ORC scripts)
- - in-instance first-boot scripts [deprecated]
  - from outside via APIs
  - orchestrated by Heat
 
@@ -64,7 +63,6 @@ step:
    script on the rabbit server - triggered by Heat - and applying the config is
    done on the compute node by the local node script - again triggered by Heat.
  - application state changes should be done from outside via APIs
- - first-boot scripts should not be used.
 
 
 Copyright

elements/boot-stack/README.md

@@ -19,19 +19,6 @@ See this doc for basic usage instructions:
   http://docs.openstack.org/developer/tripleo-incubator/devtest.html
 
 
-First Boot
-----------
-
-Upon first boot, scripts will be automatically run to perform the following:
-- database initialization
-- service restarts
-- default keystone accounts
-
-The output of the first-boot scripts can be viewed in
-`/var/log/first-boot.d.log`.  The file `/opt/stack/boot-stack/boot-stack.ok`
-will be touched upon the scripts' completion.
-
-
 Credentials
 -----------