Remove madara and pathfinder submodules

[notlesh]

This PR removes the madara and pathfinder git submodules.

[coveralls]

coverage: 67.892%. remained the same
when pulling b534e00 on notlesh/remove-submodules
into 9e67649 on main.

[apoorvsadana]

@notlesh do we want to remove this right now or when we're moving everything to a monorepo? Removing this right now will also need us to modify the Makefile

[notlesh]

@notlesh do we want to remove this right now or when we're moving everything to a monorepo? Removing this right now will also need us to modify the Makefile

I think it's fine to wait. I opened this mostly to see if CI would fail (and that would help me understand why the submodules existed in the first place.)

What would need to change about the Makefile? At first glance, it looks like it uses Madara through Docker.

Edit: The Makefile uses the submodule here: https://github.com/madara-alliance/madara-orchestrator/blob/main/Makefile#L149