Remove libvdwxc and berkeleygw

Both need FFTW directly and are not compatible with Intel's FFTW
wrapper (without additional work)

toolchains/intel-2021_10_0-impi-2021_10_0/spack.yaml.jinja

@@ -22,8 +22,6 @@ spack:
   - packages_with_mpi:
     - intel-oneapi-mkl@2023.2.0+cluster threads=openmp ^intel-oneapi-tbb
     - elpa@2023.11.001-patched
-    - libvdwxc@0.4.0+mpi~pfft
-    - berkeleygw@3.0.1+mpi~hdf5
     - parmetis@4.0.3+int64
     - hdf5@1.14.3+mpi
     - netcdf-fortran@4.6.1 ^netcdf-c+mpi

toolchains/intel-2021_6_0-impi-2021_6_0/spack.yaml.jinja

@@ -22,8 +22,6 @@ spack:
   - packages_with_mpi:
     - intel-oneapi-mkl@2022.1.0+cluster threads=openmp
     - elpa@2021.11.001
-    - libvdwxc@0.4.0+mpi~pfft
-    - berkeleygw@3.0.1+mpi~hdf5 ^[virtuals=blas,lapack,scalapack]intel-oneapi-mkl
     - parmetis@4.0.3+int64
     - hdf5@1.12.2+mpi
     - netcdf-fortran@4.6.0 ^netcdf-c+mpi

toolchains/intel-2021_9_0-impi-2021_9_0/spack.yaml.jinja

@@ -22,8 +22,6 @@ spack:
   - packages_with_mpi:
     - intel-oneapi-mkl@2023.1.0+cluster threads=openmp ^intel-oneapi-tbb
     - elpa@2023.05.001
-    - libvdwxc@0.4.0+mpi~pfft
-    - berkeleygw@3.0.1+mpi~hdf5
     - parmetis@4.0.3+int64
     - hdf5@1.14.0+mpi
     - netcdf-fortran@4.6.1 ^netcdf-c+mpi