Remove references to set_orth_region in docstrings

Author: mtfishman

docs/src/tree_tensor_networks.md

@@ -20,7 +20,7 @@ and provides a convenient interface for 1D calculations.
 
 ```@example main
 using NamedGraphs.NamedGraphGenerators: named_comb_tree
-using ITensorNetworks: ITensorNetwork, TreeTensorNetwork, siteinds, ttn, random_ttn, mps, random_mps, orthogonalize, ortho_region, set_ortho_region, add
+using ITensorNetworks: ITensorNetwork, TreeTensorNetwork, siteinds, ttn, random_ttn, mps, random_mps, orthogonalize, ortho_region, add
 import ITensors
 using Graphs: vertices, edges
 using LinearAlgebra: norm

src/treetensornetworks/abstracttreetensornetwork.jl

@@ -69,7 +69,7 @@ julia> psi = orthogonalize(psi, [vs[1], vs[2]]);
 
 ```
 
-See also: [`set_ortho_region`](@ref), [`ortho_region`](@ref), [`truncate`](@ref).
+See also: [`ortho_region`](@ref), [`truncate`](@ref).
 """
 function orthogonalize(ttn::AbstractTTN, region; kwargs...)
     return gauge(Algorithm("orthogonalize"), ttn, region; kwargs...)

src/treetensornetworks/treetensornetwork.jl

@@ -92,7 +92,7 @@ ITensorNetwork(tn::TTN) = getfield(tn, :tensornetwork)
 
 Return the set of vertices that currently form the orthogonality center of `tn`.
 
-See also: [`orthogonalize`](@ref), [`set_ortho_region`](@ref).
+See also: [`orthogonalize`](@ref).
 """
 ortho_region(tn::TTN) = getfield(tn, :ortho_region)
 
@@ -111,17 +111,8 @@ end
 # Constructor
 #
 
-"""
-    set_ortho_region(tn::TreeTensorNetwork, ortho_region) -> TreeTensorNetwork
-
-Return a copy of `tn` with the `ortho_region` metadata updated to `ortho_region`,
-**without** performing any gauge transformations on the tensors.
-
-This is a low-level bookkeeping update. To actually move the orthogonality center by
-applying QR decompositions along the tree, use [`orthogonalize`](@ref).
-
-See also: [`ortho_region`](@ref), [`orthogonalize`](@ref).
-"""
+# set_ortho_region: low-level update of the ortho_region metadata only,
+# without any gauge transformations. To move the orthogonality center use orthogonalize.
 function set_ortho_region(tn::TTN, ortho_region)
     return ttn(ITensorNetwork(tn); ortho_region)
 end