Annoying deprecation messages when using EnumMembers with enum that has deprecated members

[uranuz]

Hello! I don't no if such behaviour was made by intention or just 
an accident, but this is very annoying. There is bugzilla issue 
already for that. So I am not the only person who is concerned 
about this.
https://issues.dlang.org/show_bug.cgi?id=19864

I try to support my compiler output as clear as possible, so if 
there is some real errors. So I could find these errors as fast 
as possible without scrolling several `screens` of text about 
warnings that I am actulally unable to fix.

This error occurs when I am using std.conv: to with std.json in 
my code. So I am not the person who actually marked these enum 
members deprecated. So I can't do something with this.