petsc: remove unnecssary configure flags

      "--with-cxx=mpicxx"

      "--with-fc=mpif90"

    ]

    ++ lib.optionals withMetis [

      "--with-metis=1"

      "--with-metis-dir=${metis}"

    ]

    ++ lib.optionals withParmetis [

      "--with-parmetis=1"

      "--with-parmetis-dir=${parmetis}"

    ]

    ++ lib.optionals withPtscotch [

      "--with-ptscotch=1"

      "--with-ptscotch-include=${lib.getDev scotch}/include"

      "--with-ptscotch-lib=[-L${lib.getLib scotch}/lib,-lptscotch,-lptesmumps,-lptscotchparmetisv3,-lptscotcherr,-lesmumps,-lscotch,-lscotcherr]"

    ]

    ++ lib.optionals withScalapack [

      "--with-scalapack=1"

      "--with-scalapack-dir=${scalapack}"

    ]

    ++ lib.optionals withMumps [

      "--with-mumps=1"

      "--with-mumps-dir=${mumps_par}"

    ]

    ++ lib.optional withMetis "--with-metis=1"

    ++ lib.optional withParmetis "--with-parmetis=1"

    ++ lib.optional withPtscotch "--with-ptscotch=1"

    ++ lib.optional withScalapack "--with-scalapack=1"

    ++ lib.optional withMumps "--with-mumps=1"

    ++ lib.optionals withP4est [

      "--with-p4est=1"

      "--with-zlib-include=${lib.getDev zlib}/include"

      "--with-zlib-lib=[-L${lib.getLib zlib}/lib,-lz]"

    ]

    ++ lib.optionals withHdf5 [

      "--with-hdf5=1"

      "--with-hdf5-include=${lib.getDev hdf5-fortran-mpi}/include"

      "--with-hdf5-lib=[-L${lib.getLib hdf5-fortran-mpi}/lib,-lhdf5]"

      "--with-zlib=1"

    ]

    ++ lib.optional withHdf5 "--with-hdf5=1"

    ++ lib.optionals petsc-optimized [

      "--with-debugging=0"

      "COPTFLAGS=-O3"