Remove SparseArrayKit dependency (#227)

Author: mtfishman

Project.toml

@@ -25,7 +25,6 @@ Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 SerializedElementArrays = "d3ce8812-9567-47e9-a7b5-65a6d70a3065"
 SimpleTraits = "699a6c99-e7fa-54fc-8d76-47d257e15c1d"
-SparseArrayKit = "a9a3c162-d163-4c15-8926-b8794fbefed2"
 SplitApplyCombine = "03a91e81-4c3e-53e1-a0a4-9c0c8f19dd66"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 StructWalk = "31cdf514-beb7-4750-89db-dda9d2eb8d3d"
@@ -73,7 +72,6 @@ OMEinsumContractionOrders = "0.8.3, 0.9"
 Observers = "0.2.4"
 SerializedElementArrays = "0.1"
 SimpleTraits = "0.9"
-SparseArrayKit = "0.3, 0.4"
 SplitApplyCombine = "1.2"
 StaticArrays = "1.5.12"
 StructWalk = "0.2"