use precompile generation for Distributed instead of hardcoded list (JuliaLang/julia#33077)

Author: KristofferC

src/Distributed.jl

@@ -91,7 +91,6 @@ include("macros.jl")      # @spawn and friends
 include("workerpool.jl")
 include("pmap.jl")
 include("managers.jl")    # LocalManager and SSHManager
-include("precompile.jl")
 
 function __init__()
     init_parallel()