Remove `test_sundry`?

[StanFromIreland]

test_sundry.py is meant to "Do a minimal test of all the modules that aren't otherwise tested." The untested modules list currently contains one entry, the encodings module. That module, however, is tested as part of test_codecs. It also imports html.entities and tty, which are also tested elsewhere.

The test was added quite a long time ago (it's older than me ;-), when it "tested" a long list of modules. I think it has served its purpose, and we can remove it now. Does this sound reasonable to everyone?

[terryjreedy]

I believe this is redundant with test___all__, which seems to import every module other than _tkinter and modules that import it.