refactor: Avoid "stream_id" on sub.
refactor: Avoid "stream_id" on sub.

There was no need to put "stream_id" on the sub
dictionary here.  It's kinda annoying to introduce
the little helper here, but I feel
that's better than crufting up the sub data
structure.

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