Remove unused imports

Author: timtebeek

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaSetsFilter.java

@@ -21,11 +21,9 @@
 import org.openrewrite.TreeVisitor;
 import org.openrewrite.java.JavaIsoVisitor;
 import org.openrewrite.java.JavaTemplate;
-import org.openrewrite.java.JavaVisitor;
 import org.openrewrite.java.MethodMatcher;
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
-import org.openrewrite.java.tree.TypeUtils;
 
 import java.util.Set;