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/physics/xfitter/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, apfel, apfelgrid, applgrid, blas, gfortran, lhapdf, liblapack, libyaml, lynx, mela, root5, qcdnum, which }:
+{ stdenv, fetchurl, apfel, apfelgrid, applgrid, blas, gfortran, lhapdf, lapack, libyaml, lynx, mela, root5, qcdnum, which }:
 
 stdenv.mkDerivation rec {
   pname = "xfitter";
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ gfortran which ];
   buildInputs =
-    [ apfel apfelgrid applgrid blas lhapdf liblapack mela root5 qcdnum ]
+    [ apfel apfelgrid applgrid blas lhapdf lapack mela root5 qcdnum ]
     # pdf2yaml requires fmemopen and open_memstream which are not readily available on Darwin
     ++ stdenv.lib.optional (!stdenv.isDarwin) libyaml
     ;