openmolcas: fix fallout from #83888

Removed non-functional lines.
Openmolcas does not build with the blas/lapack switching mechanism

pkgs/applications/science/chemistry/openmolcas/default.nix

@@ -1,11 +1,9 @@
 { stdenv, fetchFromGitLab, cmake, gfortran, perl
-, openblas, blas, lapack, hdf5-cpp, python3, texlive
+, openblas, hdf5-cpp, python3, texlive
 , armadillo, openmpi, globalarrays, openssh
 , makeWrapper, fetchpatch
 } :
 
-assert blas.implementation == "openblas" && lapack.implementation == "openblas";
-
 let
   version = "20.10";
   gitLabRev = "v${version}";