[DIP1005] Unused imports in with(import) declarations: leave alone of flag as errors?

[Andrei Alexandrescu via Digitalmars-d]

Consider:

with (import std.stdio)
int fun(int x/*, File f*/)
{
     // f.writeln("In: ", x);
     return x * x;
}

Such situations occur during refactorings and code evolution. The import 
is no longer used. Should the compiler flag that as an error, or leave 
it be?


Andrei