fix spotless bugs

Issue: #768
Signed-off-by: Timo Thomas <[email protected]>

Author: ttho

archunit/src/test/java/com/tngtech/archunit/core/importer/ClassFileImporterLocalVariableDependenciesTest.java

@@ -13,7 +13,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.Stack;
+
 
 import static com.tngtech.archunit.testutil.Assertions.assertThatReferencedClassObjects;
 import static com.tngtech.archunit.testutil.assertion.ReferencedClassObjectsAssertion.referencedClassObject;