Avoid delays in async and cancellation tests

Author: captainsafia

src/OpenApi/test/Microsoft.AspNetCore.OpenApi.Tests/Transformers/DocumentTransformerTests.cs

@@ -316,7 +316,6 @@ public async Task DocumentTransformer_ExecutesAsynchronously()
             Assert.Equal("First Second Third", document.Info.Title);
         });
 
-        await Task.Yield();
         tcs1.TrySetResult();
 
         await documentTask;

src/OpenApi/test/Microsoft.AspNetCore.OpenApi.Tests/Transformers/OperationTransformerTests.cs

@@ -648,7 +648,6 @@ public async Task OperationTransformer_ExecutesAsynchronously()
             Assert.Equal("First Second Third", operation.Description);
         });
 
-        await Task.Yield();
         tcs1.TrySetResult();
 
         await documentTask;

src/OpenApi/test/Microsoft.AspNetCore.OpenApi.Tests/Transformers/SchemaTransformerTests.cs

@@ -927,7 +927,6 @@ public async Task SchemaTransformer_ExecutesAsynchronously()
             Assert.Equal("First Second Third", schema.Description);
         });
 
-        await Task.Yield();
         tcs1.TrySetResult();
 
         await documentTask;