The npm mirror was removed with
Id539d336814cce2ce18898526e561b8b6977f62f. This change is "inspired"
by a proposed puppet-nodejs update in
Ia7966fb9578d0d79f3a7f9480e3a956555737dc8. Rather than fixing it up
for the new version, remove it (also, puppet is failing trying to
access /afs/.openstack.org/mirror/npm).
I believe the npmrc.erb file is actually a vestige of prior release
methods and is also no longer required.
Change-Id: I6fa48e4700779d2c90194f0129c770bf2d6d865f
7ace3799f1