more unused code removal

Author: lkdvos

src/MPSKit.jl

@@ -61,7 +61,6 @@ export TransferMatrix
 export transfer_left, transfer_right
 
 @deprecate virtualspace left_virtualspace # there is a possible ambiguity when C isn't square, necessitating specifying left or right virtualspace
-@deprecate params(args...) environments(args...)
 
 # Abstract type defs
 abstract type Algorithm end

test/algorithms.jl

@@ -752,34 +752,6 @@ end
 end
 
 @testset "periodic boundary conditions" begin
-    # len = 10
-
-    # #impose periodic boundary conditions on the hamiltonian (circle size 10)
-    # H = transverse_field_ising(;)
-    # H = periodic_boundary_conditions(H, len)
-
-    # ψ = FiniteMPS(len, ℂ^2, ℂ^10)
-
-    # gs, envs = find_groundstate(ψ, H, DMRG(; verbosity=0))
-
-    # #translation mpo:
-    # @tensor bulk[-1 -2; -3 -4] := isomorphism(ℂ^2, ℂ^2)[-2, -4] *
-    #                               isomorphism(ℂ^2, ℂ^2)[-1, -3]
-    # translation = periodic_boundary_conditions(InfiniteMPO(PeriodicVector([bulk])), len)
-
-    # #the groundstate should be translation invariant:
-    # ut = ones(ℂ^1)
-    # @tensor leftstart[-1 -2; -3] := l_LL(gs)[-1, -3] * conj(ut[-2])
-    # T = TransferMatrix([gs.AC[1]; gs.AR[2:end]], translation[:], [gs.AC[1]; gs.AR[2:end]])
-    # v = leftstart * T
-
-    # expval = @tensor v[1, 2, 3] * r_RR(gs)[3, 1] * ut[2]
-
-    # @test expval ≈ 1 atol = 1e-5
-
-    # energies, values = exact_diagonalization(H; which=:SR)
-    # @test energies[1] ≈ expectation_value(gs, H) atol = 1e-5
-
     Hs = [transverse_field_ising(), heisenberg_XXX(), classical_ising(), sixvertex()]
     for N in 2:6
         for H in Hs