remove zygote

Author: mjohnson541

Project.toml

@@ -39,7 +39,6 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 YAML = "ddb6d928-2868-570f-bddf-ab3f9cf99eb6"
-Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [compat]
 Calculus = "0.4,0.5"
@@ -72,5 +71,4 @@ Symbolics = "4"
 Tracker = "0.2"
 Unitful = "^1.3"
 YAML = "0.4"
-Zygote = "0.5,0.6"
 julia = "^1.6"