feature(#20): this commit removes error handling for “InvalidAudienceValue”

Author: https-richardy

Applications/Backend/Source/HttpsRichardy.Federation.WebApi/Controllers/ClientsController.cs

@@ -158,10 +158,7 @@ public async Task<IActionResult> AssignAudienceAsync([FromRoute] string id, [Fro
                 StatusCode(StatusCodes.Status404NotFound, result.Error),
 
             { IsFailure: true } when result.Error == ClientErrors.ClientAlreadyHasAudience =>
-                StatusCode(StatusCodes.Status409Conflict, result.Error),
-
-            { IsFailure: true } when result.Error == ClientErrors.InvalidAudienceValue =>
-                StatusCode(StatusCodes.Status400BadRequest, result.Error),
+                StatusCode(StatusCodes.Status409Conflict, result.Error)
         };
     }