Update UpdateSdkMan.java

Author: timtebeek

src/main/java/org/openrewrite/java/migrate/UpdateSdkMan.java

@@ -33,7 +33,6 @@
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.util.stream.Collectors;
 
 import static java.util.Objects.requireNonNull;
 import static java.util.stream.Collectors.toList;