fix: reduced mockito usage pass 2 for #2707

Author: Julien Kronegg

cucumber-java8/src/test/java/io/cucumber/java8/Java8BackendTest.java

@@ -1,7 +1,6 @@
 package io.cucumber.java8;
 
-import io.cucumber.core.backend.Glue;
-import io.cucumber.core.backend.ObjectFactory;
+import io.cucumber.core.backend.*;
 import io.cucumber.java8.steps.Steps;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;