(from #19719)

Our version of ATLAS is outdated and has not been tested in a long time. Latest upstream version as of 2021-09-21 is 3.11.40, released 2018-10-02, see ​https://github.com/math-atlas/math-atlas/releases

We remove this package.

However, we keep the makefile variable BLAS (used in packages' dependencies files), rather than hardcoding openblas in dependencies. It will make it easier to plug in another BLAS implementation if one comes along in the future, and it is also needed for #29387.

CC: @jhpalmieri @dimpase @kiwifb @jpflori

Component: packages: standard

Author: John Palmieri

Branch/Commit: 272424a

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/30350