remove SparseArrays dependency

Author: lkdvos

Project.toml

@@ -8,7 +8,6 @@ LRUCache = "8ac3fa9e-de4c-5943-b1dc-09c6b5f20637"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 PackageExtensionCompat = "65ce6f38-6b18-4e1d-a461-8949797d7930"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
-SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Strided = "5e0ebb24-38b0-5f93-81fe-25c709ecae67"
 TensorKitSectors = "13a9c161-d5da-41f0-bcbd-e1a08ae0647f"
 TensorOperations = "6aa20fa7-93e2-5fca-9bc0-fbd0db3c71a2"
@@ -33,7 +32,6 @@ LRUCache = "1.0.2"
 LinearAlgebra = "1"
 PackageExtensionCompat = "1"
 Random = "1"
-SparseArrays = "1"
 Strided = "2"
 TensorKitSectors = "0.1"
 TensorOperations = "5.1"

src/TensorKit.jl

@@ -126,8 +126,6 @@ using LinearAlgebra: norm, dot, normalize, normalize!, tr,
                      isposdef, isposdef!, ishermitian, rank, cond,
                      Diagonal, Hermitian
 
-using SparseArrays: SparseMatrixCSC, sparse, nzrange, rowvals, nonzeros
-
 import Base.Meta
 
 using Random: Random, rand!, randn!