Closed
Description
FHDLTestCase is no longer accessible in nMigen 0.3.
An attempt to import it should still fail, but let the user
know FHDLTestCase was intentionally removed.
Perhaps something to the effect of
Removal Notice: FHDLTestCase has been removed as per https://github.com/nmigen/nmigen/pull/399#issuecomment-638514027
Maybe Removal Notice
could be highlighted in red?