Remove UseExceptionHandler() extension

[fragilerus]

The ExcptionHanlerMiddleware no longer supports empty options. Either ExceptionHandler or ExceptionHandlingPath has to be set. Therefore, the ExceptionHandlerExtensions.UseExceptionHandler() overload that takes no arguments can't be used. Either remove this or set a default for the options.

[Tratcher]

This overload can be used with services.Configure<ExceptionHandlingOptions>(options => ...);

[fragilerus]

Thank you, I did not think of that.