Disable edits-monthly-5plus-editors graph updates

AKA Editors registered on mobile who made 5+ edits on enwiki
(mobile+desktop)

Unfortunately, the SQL query for this times out. This is a sign that the
whole limn-mobile-data requires a thorough rewrite.

Change-Id: Ica2dbe80eb306a511cb61f040dcc1b11675e5ebd