disable reqstats.edits dash involving many metrics

using wildcards will result in graphite-web doing many lookups since
reqstats.edits has many children, this in turn locks up uwsgi workers blocked
in I/O.

temporarily disabling those graphs will prevent casual dashboard browsers from
putting graphite in trouble until we have a more powerful setup

Change-Id: Id3fdd0e99c6850945006aa1eae157c1a25d0782a