Apply suggestions from code review

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: timtebeek

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

@@ -24,8 +24,6 @@
 import org.openrewrite.java.MethodMatcher;
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
-import org.openrewrite.java.tree.JavaType;
-
 import java.util.Set;
 
 import static java.util.Collections.singleton;