By Ed Warner This is a Paris you’ve never known and never will again. Empty side streets speak of Parisians good to their threats to vacate for the Olympics. Hotel receptionists attest to sluggish bookings. Restaurants are shuttered. And yet the crowds are here, French and foreigners alike. They exude a relaxed urgency, a collegiate passion. The sport matters madly to them, but not to the point of despondency. These Games have truly cast their spell. WhatsApp groups are awash with emojis denoting delirium and despair at athlete performances. TV anchors tease tears from stars whether they’ve wo…