Remove Manifest from master

[aminya]

Using Manifest breaks backward compatibility, and it is a bad practice to add it to the master. You should allow Pkg to generate Manifest. By checking Manifest, you will bypass all of Pkg goodness across different users and Julia versions.

You should instead use compat entry for limiting the package bounds.

PackageX = "0.4, 1"

For example by using Manifest, If a dep starts to use a Jil package, all of the Julia versions older than 1.3 will break.

[[IntelOpenMP_jll]]
deps = ["Libdl", "Pkg"]
git-tree-sha1 = "fb8e1c7a5594ba56f9011310790e03b5384998d6"
uuid = "1d5cc7b8-4909-519e-a0f8-d0f5ad9712d0"
version = "2018.0.3+0"

related FluxML/Zygote.jl#629

[aminya]

@MikeInnes @CarloLucibello @dhairyagandhi96 This is not fixed yet. Not sure why it is closed.