PuppetDB: Remove v1 query API from master

We have retired the v1 query API in the master revision of PuppetDB (known as
the 2.x branch). This patch removes the v1 parts from the LHS index of the
docs page.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #281 from kbarber/maint/master/puppetdb-remove-v1-query-api

PuppetDB: Remove v1 query API from master