Remove DataStructures from dependencies

Author: blegat

Project.toml

@@ -5,7 +5,6 @@ authors = ["Sophie Lequeu <slequeu@hotmail.com>", "Benoît Legat <benoit.legat@g
 
 [deps]
 Calculus = "49dc2e85-a5d0-5ad3-a950-438e2897f1b9"
-DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
 ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
 MathOptInterface = "b8f27783-ece8-5eb3-8dc8-9495eed66fee"
 NaNMath = "77ba4419-2d1f-58cd-9bb1-8ffee604a2e3"
@@ -16,7 +15,6 @@ SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 
 [compat]
 Calculus = "0.5.2"
-DataStructures = "0.18, 0.19"
 ForwardDiff = "1"
 MathOptInterface = "1.40"
 NaNMath = "1"