Remove Windows as target machine from CI

[ZER0]

Describe what you want implemented
CI shouldn't currently target Windows machine.

Describe "Why" this is needed
Having Windows as working machine is nice but it's not a target machine for our libraries. We had some random CI failures with no explanation whatsoever, and tests on Windows takes ages, slowing down the development process.
We can have a separate workflow for Windows once we reach a good level of library stabilization and we decide to target Windows too.

Describe alternatives you've considered
N/A

Additional context
N/A