Remove type piracy

[ryanlevy]

in src/utils.jl we have some type piracy

ITensorNumericalAnalysis.jl/src/utils.jl

Lines 50 to 67 in e508b66

	function ITensors.inds(s::IndsNetwork, v)
	return s[v]
	end
	function ITensors.inds(s::IndsNetwork, verts::Vector)
	return reduce(vcat, [inds(s, v) for v in verts])
	end
	function ITensors.inds(s::IndsNetwork)
	return inds(s, collect(vertices(s)))
	end
	function base(s::IndsNetwork)
	indices = inds(s)
	dims = dim.(indices)
	@assert all(d -> d == first(dims), dims)
	return first(dims)
	end

We should probably remove these and also be more careful, thinking toward multiple base within the index maps