cleanup old codes

[ringabout]

ref timotheecour#389

clean when (NimMajor, NimMinor, NimPatch) > (0, 10, 2): and unnecessary imports.

[Clyybber]

Should be left as is IMO, it might test some otherwise untested path and the compiler should continue to be correct for non-minimized/cleaned-up code too, afterall :)

[timotheecour]

Should be left as is IMO, it might test some otherwise untested path and the compiler should continue to be correct for non-minimized/cleaned-up code too, afterall :)

This is historical artifcat; tests should have a specific purpose; if you want that, put this logic in a dedicated code block whose intent is to test that. And there already are plenty of tests that test this (eg when false ... else: ...)

[Araq]

So where is this other test that does a Nim version check inside a concept? I'm leaving it as it is for now but please be a little bit more careful. Tests shouldn't be "minimal" or beautiful, tests can never test enough!