No-op old search indexing migrations which no longer run and have been obsoleted by upgrade "activities"
We don't need these migrations, since anyone upgrading through September 2017 gets a "rebuild search indexes" activity anyway (see T11932). Just no-op them.
Test Plan: Grepped for queueDocumentForIndexing() in autopatches/, removed all of it.
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D20243