ChainRules itself not needed (yet?)

Author: matbesancon

Project.toml

@@ -4,7 +4,6 @@ authors = ["JuliaStats"]
 version = "0.25.53"
 
 [deps]
-ChainRules = "082447d4-558c-5d27-93f4-14fc19e9eca2"
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
 DensityInterface = "b429d917-457f-4dbc-8f4c-0cc954292b1d"
 FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"