No.
The key constraint in an aircraft is the cubic area available for sale.
For a passenger, given we haven't yet managed to have a design that stacks people, that comes down to floor space -- so the cost to carry a 50kg person in a seat that is 18" wide and 31" pitch is not substantially different to a 120kg person in a seat that is 18" wide and 31" pitch. Business/ First comes at a substantial additional cost becasue it takes up more of the airplane.
For cargo freight - this is mostly charged on a combination of cubic dimensions and weight.
For baggage - again the cubic dimensions are the key, but for ease of application all airlines seem to use a weight system - afterall most people are carrying clothes/ shoes of a similar density
For cabin baggage - its partially constrained by the size of the bins, but the weight restriction (if ever enforced) also effectively limits the size.
Granted that for some planes at the limit of MTOW that individual pax weights can make a difference