Delete duplicate call to wiUtils.EnsureFieldsOnStateChange in unit tests

Author: Alexander-Hjelm

src/WorkItemMigrator/tests/Migration.Wi-Import.Tests/WitClient/WitClientUtilsTests.cs

@@ -417,8 +417,6 @@ public void When_calling_ensure_fields_on_a_wi_with_no_state_field_Then_no_execp
 
             WorkItem createdWI = wiUtils.CreateWorkItem("User Story", false);
 
-            wiUtils.EnsureFieldsOnStateChange(rev, createdWI);
-
             Assert.DoesNotThrow(() => wiUtils.EnsureFieldsOnStateChange(rev, createdWI));
 
             Assert.Multiple(() =>