My pedal makes an irritating noise when fully released. I believe it is due to the excess play in the pedal assembly bushings/fasteners. When I put pressure in either direction the noise is eliminated.
After 53 or so years, the plastic bushings wear out. They cost all of $0.99 each. You need four. Feel free to replace them. It's a good winter task. Don't drop the clip or washer.
As long as you're doing this, consider replacing the two similar bushings used on the shifter.
PS: I use white lithium grease on the shafts.
Jim