Polish

Author: wilkinsona

buildSrc/src/main/java/org/springframework/boot/build/bom/bomr/UpgradeBom.java

@@ -23,7 +23,6 @@
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Optional;
 import java.util.Properties;