treewide: use blas and lapack

This makes packages use lapack and blas, which can wrap different
BLAS/LAPACK implementations.

treewide: cleanup from blas/lapack changes

A few issues in the original treewide:

- can’t assume blas64 is a bool
- unused commented code

pkgs/applications/science/math/csdp/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, blas, gfortran, liblapack }:
+{ lib, stdenv, fetchurl, blas, gfortran, lapack }:
 
 stdenv.mkDerivation {
   name = "csdp-6.1.1";
@@ -8,7 +8,7 @@ stdenv.mkDerivation {
     sha256 = "1f9ql6cjy2gwiyc51ylfan24v1ca9sjajxkbhszlds1lqmma8n05";
   };
 
-  buildInputs = [ blas gfortran.cc.lib liblapack ];
+  buildInputs = [ blas gfortran.cc.lib lapack ];
 
   postPatch = ''
     substituteInPlace Makefile --replace /usr/local/bin $out/bin