twitter-server: Remove extraneous scaladoc generation

Problem/Solution

We generate unidoc in the pushsite script but do not
use the generated docs. Let's stop generating them
until such time as we want to make them publicly
available in the site.

RB_ID=907068

pushsite.bash

@@ -8,9 +8,6 @@ trap "rm -fr $dir" 0 1 2
 echo 'making site...' 1>&2
 ./sbt --warn twitter-server-doc/make-site
 
-echo 'making unidoc...' 1>&2
-./sbt --warn unidoc
-
 echo 'cloning...' 1>&2
 git clone -b gh-pages --single-branch git@github.com:twitter/twitter-server.git $dir >/dev/null 2>&1