Remove Pkg as a dependency

This removes ~0.4s from the load time.

Author: JamesWrigley

Project.toml

@@ -9,7 +9,6 @@ Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
 Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
-Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 Serialization = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 UnsafePointers = "e17b2a0c-0bdf-430a-bd0c-3a23cae4ff39"
@@ -21,7 +20,6 @@ Dates = "1"
 Libdl = "1"
 MacroTools = "0.5"
 Markdown = "1"
-Pkg = "1"
 PyCall = "1"
 Serialization = "1"
 Tables = "1"

src/JlWrap/JlWrap.jl

@@ -30,7 +30,6 @@ import ..PythonCall:
     PyObjectMatrix,
     PyObjectArray
 
-using Pkg: Pkg
 using Base: @propagate_inbounds, allocatedinline
 
 import ..Core: Py
@@ -70,7 +69,6 @@ function __init__()
     jl.Core = Base.Core
     jl.Base = Base
     jl.Main = Main
-    jl.Pkg = Pkg
     jl.PythonCall = PythonCall
 end