Tracker: breaking API changes

[dhardy]

Pub fn ThreadRng::reseed returns a Result<(), SysError>. I do not think this is useful in practice; we already handle the same error internally on initialization and periodic reseeding by panicking.

• Action: remove return value of fn ThreadRng::reseed

[dhardy]

Consider revising partial_shuffle's return value (see #1768):

• Remove rest from output of fn partial_shuffle