Revert single new test, as necessary API wasn't backported

tests/Avalonia.Controls.UnitTests/TextBlockTests.cs

@@ -30,27 +30,6 @@ public void Default_Text_Value_Should_Be_Null()
             Assert.Equal(null, textBlock.Text);
         }
 
-        [Fact]
-        public void Calling_Measure_Should_Update_Constraint_And_TextLayout()
-        {
-            using (UnitTestApplication.Start(TestServices.MockPlatformRenderInterface))
-            {
-                var textBlock = new TestTextBlock { Text = "Hello World" };
-
-                textBlock.Measure(new Size(100, 100));
-
-                var textLayout = textBlock.TextLayout;
-
-                Assert.Equal(new Size(100,100), textBlock.Constraint);
-
-                textBlock.Measure(new Size(50, 100));
-
-                Assert.Equal(new Size(50, 100), textBlock.Constraint);
-
-                Assert.NotEqual(textLayout, textBlock.TextLayout);
-            }
-        }
-
         [Fact]
         public void Changing_InlinesCollection_Should_Invalidate_Measure()
         {
@@ -349,10 +328,5 @@ public void TextBlock_TextLines_Should_Be_Empty()
                 Assert.NotEqual(count, count1);
             }
         }
-
-        private class TestTextBlock : TextBlock
-        {
-            public Size Constraint => _constraint;
-        }
     }
 }