Remove old changes

Author: JoeyT1994

src/abstractitensornetwork.jl

@@ -797,23 +797,6 @@ end
 is_multi_edge(tn::AbstractITensorNetwork, e) = length(linkinds(tn, e)) > 1
 is_multi_edge(tn::AbstractITensorNetwork) = Base.Fix1(is_multi_edge, tn)
 
-function edges_equal(e1s, e2s)
-  if length(e1s) != length(e2s)
-    return false
-  end
-  for e in e1s
-    if e ∉ e2s && reverse(e) ∉ e2s
-      return false
-    end
-  end
-  return true
-end
-
-
-function edges_equal(tn1::AbstractITensorNetwork, tn2::AbstractITensorNetwork)
-  return edges_equal(edges(tn1), edges(tn2))
-end
-
 """Add two itensornetworks together by growing the bond dimension. The network structures need to be have the same vertex names, same site index on each vertex """
 function ITensorMPS.add(tn1::AbstractITensorNetwork, tn2::AbstractITensorNetwork)
   @assert issetequal(vertices(tn1), vertices(tn2))
@@ -823,14 +806,13 @@ function ITensorMPS.add(tn1::AbstractITensorNetwork, tn2::AbstractITensorNetwork
 
   edges_tn1, edges_tn2 = edges(tn1), edges(tn2)
 
-  if !edges_equal(tn1, tn2)
+  if !issetequal(tn1, tn2)
     new_edges = union(edges_tn1, edges_tn2)
     tn1 = insert_linkinds(tn1, new_edges)
     tn2 = insert_linkinds(tn2, new_edges)
   end
 
   edges_tn1, edges_tn2 = edges(tn1), edges(tn2)
-  @assert edges_equal(tn1, tn2)
 
   tn12 = copy(tn1)
   new_edge_indices = Dict(
@@ -852,7 +834,6 @@ function ITensorMPS.add(tn1::AbstractITensorNetwork, tn2::AbstractITensorNetwork
     e1_v = filter(x -> src(x) == v || dst(x) == v, edges_tn1)
     e2_v = filter(x -> src(x) == v || dst(x) == v, edges_tn2)
 
-    @assert edges_equal(e1_v, e2_v)
     tn1v_linkinds = Index[only(linkinds(tn1, e)) for e in e1_v]
     tn2v_linkinds = Index[only(linkinds(tn2, e)) for e in e1_v]
     tn12v_linkinds = Index[new_edge_indices[e] for e in e1_v]