Removed Unused Private Method - HandleValidationStateChanged (#18275)

* Update ValidationMessage.cs

* Update ValidationSummary.cs

src/Components/Web/src/Forms/ValidationMessage.cs

@@ -80,11 +80,6 @@ namespace Microsoft.AspNetCore.Components.Forms
             }
         }
 
-        private void HandleValidationStateChanged(object sender, ValidationStateChangedEventArgs eventArgs)
-        {
-            StateHasChanged();
-        }
-
         protected virtual void Dispose(bool disposing)
         {
         }

src/Components/Web/src/Forms/ValidationSummary.cs

@@ -92,11 +92,6 @@ namespace Microsoft.AspNetCore.Components.Forms
             }
         }
 
-        private void HandleValidationStateChanged(object sender, ValidationStateChangedEventArgs eventArgs)
-        {
-            StateHasChanged();
-        }
-
         protected virtual void Dispose(bool disposing)
         {
         }