Deletion of Line 6 (Montreal Metro)

Comment: I'd say... a https://www.google.ca/search?q=Line+6+(Montreal+Metro&rlz=1C5CHFA_enCA548CA548&oq=Line+6+(Montreal+Metro&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8#q=Line+6+(Montreal+Metro&tbm=nws&tbs=ar:1 Google News Archive search reveals multiple news refs from the ''Montreal Gazette'' in 1982-4, satisfying  for this unbuilt line. The defunct (but not online ''Montreal Star'' would have more, I'm sure
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG)