Foreign oddities:
Arabs offering sheep eyeballs in a bed of yogurt
Indians offering peace pipes stuffed with horrible contents
Eskimos offering their wives
Refusal invites death
How about a nice gentile couple rushing to get married and all they can find is a rabbi to officiate? I haven’t seen that since one of the Lethal Weapon movies.
A dog running out of a butcher shop, trailing a string of frankfurters
“I’ll just give him a piece of my mind!”
-cut to him with a steak on his black eye
Bankruptcy =
Middle-class families having maids at all.
And we are the lesser for it. 
Rubber chickens being funny.
You don’t see the old pie in the face gag much anymore, either.
Why, this elevator is stuck between floors! And that woman is going into labor!
I know the reason for that one. The most used cultivar of bananas today has a peel nowhere near as slippery as the one in wide use when the trope first originated.
The DTs still happen- sadly.
The still do. Just a little bit ago, they replaced all the 'real" super powers on Legends of Tomorrow… Walker Texas Ranger, Cobra Kai, etc altho Martial arts is now bigger than Boxing. There’s often at least one fight on NCIS and other cop shows.
Car chases have declined on TV.
Three’s company wouldnt work today.
Lots of school stuff:
Kids running from the “truancy officer,” and adults threatening to send a bad child to “Reform School.”
A child having to write an apology over and over on the blackboard.
Giving the teacher an apple.
Dunking a girl’s hair in ink.
My aunt was a teacher. Mom(her sister) gave her some sort of decorative apple every Christmas
Went the way of inkwells…
Men ordering food for their dates without consulting them first.
Good riddance to this one. 
I feel I’ve still seen “Man joins the military because it was either that or prison” in movies to this day despite that not really being a thing at all since the 1970s.
Also people getting stuck in walk-in freezers was a sitcom staple but now I can only remember it last being seen in the 00s.
Svengoolie and his fans would disagree.
Or having to wear a dunce cap.
How about “reverse the polarity”.
I always assumed people slipped on the peel with the outer peel up, inside down.
Although acute alcoholic psychosis is known in the medical literature, it’s far more common for hallucinations to be a result of alcoholic withdrawal, delirium tremens. I wonder if the trope of hallucinating while drunk dates from a time in which poisonously bad “hooch” was a thing, a holdover from Prohibition.
It was done seriously on a 2011 episode of Castle, in which a killer trapped Castle and Beckett in a freezer and they were facing the real prospect of death.
There’s a more general head injury trope. Whereby a character receives a head injury, they are momentarily stunned (see stars or circling tweety birds) but then continue on their way without any untoward effects or seeking medical attention.
This still comes up occasionally in the recently made cartoons my kids watch, but I think will be viewed as negatively as things like smoking before long.
Another dead trope: although people can still be depicted as clueless, moronic or jerkasses, it’s no longer appropriate to make fun of people with true intellectual disability. The Warner cartoons featuring Pete Puma with his slurred speech would not fly today.