Deprecations and removals process

[Paul Backus]

On Tuesday, 11 May 2021 at 15:34:09 UTC, Witold Baryluk wrote:
> Is there a formal process for deprecation for D and Phobos, and 
> procedures that such changes undergo, to make it clear and 
> discoverable?

The current process is described in DIP 1013, "The Deprecation 
Process":

https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1013.md

However, this process was adopted relatively recently, in 2019, 
so it would not have applied to the changes you mentioned in your 
post.