Remove unused import

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Author: timtebeek

src/test/java/org/openrewrite/staticanalysis/JavaToCsharp.java

@@ -21,8 +21,6 @@
 import org.openrewrite.java.tree.Statement;
 
 import java.util.List;
-import java.util.stream.Collectors;
-
 import static java.util.stream.Collectors.toList;
 
 public class JavaToCsharp {