Remove "Application" field from ConduitSearchEngine
Summary: Fixes T9063. Removes the "Application" field from the search because it was largely redundant with the 'Name Contains' field.
Test Plan: Went to `/conduit/query/modern/`, clicked on `Edit Query` and noted that there is no "Application" field anymore. The 'Name Contains' field still works however.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley, yelirekim
Maniphest Tasks: T9063
Differential Revision: https://secure.phabricator.com/D16602