Silence verbose duplicate constructor and operator warnings.

src/Generator/Passes/CheckDuplicatedNamesPass.cs

@@ -71,12 +71,10 @@ namespace CppSharp.Passes
             {
                 // TODO: turn into a method; append the original type (say, "signed long")
                 // of the last parameter to the type so that the user knows which overload is called
-                Diagnostics.Warning("Duplicate operator {0} ignored", function.Name);
                 function.ExplicitlyIgnore();
             }
             else if (method != null && method.IsConstructor)
             {
-                Diagnostics.Warning("Duplicate constructor {0} ignored", function.Name);
                 function.ExplicitlyIgnore();
             }
             else