Copying into column major storage no longer needed

[mscroggs]

In these lines:

basix/cpp/basix/finite-element.cpp

Lines 322 to 323 in 2d33961

	xt::xtensor<double, 2> B_cmajor({wcoeffs.shape(0), wcoeffs.shape(1)});
	B_cmajor.assign(wcoeffs);

wcoeffs used to be copied into column major storage. But now that we no longer use xtensor linalg, this copy is probably no longer needed

[IgorBaratta]

Agree, specially because we already copy into a column major matrix before calling Lapack.

basix/cpp/basix/math.cpp

Lines 71 to 75 in 201f0ea

	xt::xtensor<double, 2, xt::layout_type::column_major> _A(A.shape());
	_A.assign(A);
	xt::xarray<double, xt::layout_type::column_major> _B(B.shape());
	_B.assign(B);