Check that function calls look like ^function foo {$ in bash8, and fix
all existing failures of that check. Add a note to HACKING.rst
Change-Id: Ic19eecb39e0b20273d1bcd551a42fe400d54e938
The files/pips/* files were removed a while ago (replaced by
pip-requires in individual projects). So remove leftover code that was
dealing with that.
Change-Id: Id521a3365ab018193607389f022a25acddb49714