Proud member of the Foundry Discord, for (almost) all your planetary discussion needs
Features
Runs during data-final-fixes, for every planet, space location, and space connection, removes their asteroid spawn definitions table, essentially preventing all asteroids from spawning in space (this includes harmless)
Notes
This mod was created by user request, as an alternative to Asteroid Frequency Multiplier, as the minimum limit prevents lowering the asteroid frequency to zero.
I don't believe the game can be beaten without a third-party mod like Muluna, in order to collect asteroids from an alternative source. Muluna was not added as a mandatory requirement, in case there are any other mods that wish to fill in the gap.