XWIKI-16192: Refactor links to support properly backlinks in a farm

* remove unused import

xwiki-platform-core/xwiki-platform-oldcore/src/test/java/com/xpn/xwiki/doc/XWikiDocumentTest.java

@@ -38,7 +38,6 @@
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
 import org.mockito.Mock;
-import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
 import org.xwiki.context.Execution;
 import org.xwiki.model.reference.DocumentReference;