"WARNING: replacing module..." is no longer printed when replacing modules

[topolarity]

Not sure if this is intended as part of binding replacement or not, but wanted to open an issue just in case.

On nightly:

julia> module Foo; end
Main.Foo

julia> module Foo; end
Main.Foo

On 1.11:

julia> module Foo; end
Main.Foo

julia> module Foo; end
WARNING: replacing module Foo.
Main.Foo

[Keno]

I removed the warning intentionally. This was UB before, so the warning was appropriate. Now this is just a special case of constant redefinition, which we never warn for.

[Keno]

That said, we should probably extend the world age printing to the module case as well:

julia> module Foo; end
Main.Foo

julia> oldFoo = Foo
Main.Foo

julia> module Foo; end
Main.Foo

julia> oldFoo
Main.Foo