Depends if they are being used. If you have fibre, they're not needed. If you have DSL and no POTS splitter installed, they will be needed. Telus has pretty much switched from the filters to the POTS splitters as they more effectively isolate the phone jack the modem is connected to. If Telus installed one in the house, the filters won't typically be needed anymore.
An example of a POTS splitter: (Telus installed this model in my place)
If the outlet has 2 jacks on the same plate and they are designated for phone and modem then there is most likely a POTS splitter somewhere. If you are in a condo/apartment it may be installed behind the main phone jack in a living room or bedroom. If your home has an electrical panel it is probably mounted there next to the termination block where all the phone lines in the house meet up. You do not need those old microfilters anymore.