upgrade: Drop the unnecessary step that stops the old cluster.
upgrade: Drop the unnecessary step that stops the old cluster.

The initial step in pg_upgradecluster stops the cluster for us; this
removes the somewhat ugly hack we are otherwise forced into.

rht/zulip,showell/zulip,eeshangarg/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,kou/zulip,brainwane/zulip,rht/zulip,eeshangarg/zulip,rht/zulip,showell/zulip,andersk/zulip,showell/zulip,punchagan/zulip,punchagan/zulip,hackerkid/zulip,brainwane/zulip,rht/zulip,eeshangarg/zulip,brainwane/zulip,rht/zulip,hackerkid/zulip,brainwane/zulip,punchagan/zulip,punchagan/zulip,kou/zulip,kou/zulip,kou/zulip,zulip/zulip,punchagan/zulip,showell/zulip,kou/zulip,kou/zulip,zulip/zulip,hackerkid/zulip,brainwane/zulip,zulip/zulip,brainwane/zulip,brainwane/zulip,showell/zulip,zulip/zulip,zulip/zulip,hackerkid/zulip,rht/zulip,eeshangarg/zulip,kou/zulip,rht/zulip,andersk/zulip,andersk/zulip,eeshangarg/zulip,showell/zulip,andersk/zulip,punchagan/zulip,showell/zulip,hackerkid/zulip