Dropping requires: from setup.ini?

[Jon Turney]

Perhaps it's time to consider dropping the requires: line from setup.ini?

requires: contains the union of dependencies for all package versions 
(long ago, it was the dependencies for the current package version, and 
the dependencies for other versions were not available to setup, with 
hilarious consequences...)

requires: is superfluous to depends2:, which versions of setup since 
2.888 (Feb 2018) understand, but there may be some other 3rd-party tools 
which still rely on it.

Dropping it also reduces the size of setup.ini by about 5%.

(See [1] for an example of the confusion it's continued existence can cause)

(setup versions <2.903 are precluded from trying to use a current 
setup.ini, by a combination of changed signing key and policy mechanisms 
inside setup)

[1] https://cygwin.com/pipermail/cygwin/2022-February/250949.html