Update S/slope/build_tarballs.jl

Author: fingolfin

S/slope/build_tarballs.jl

@@ -1,10 +1,5 @@
 using BinaryBuilder, Pkg
 
-# See https://github.com/JuliaLang/Pkg.jl/issues/2942
-# Once this Pkg issue is resolved, this must be removed
-uuid = Base.UUID("a83860b7-747b-57cf-bf1f-3e79990d037f")
-delete!(Pkg.Types.get_last_stdlibs(v"1.6.3"), uuid)
-
 const YGGDRASIL_DIR = "../.."
 include(joinpath(YGGDRASIL_DIR, "platforms", "macos_sdks.jl"))