CreateTable: remove unnecessary clear() on newly created HashSet

h2/src/main/org/h2/command/ddl/CreateTable.java

@@ -137,7 +137,6 @@ public class CreateTable extends CommandWithColumns {
                 }
             }
             HashSet<DbObject> set = new HashSet<>();
-            set.clear();
             table.addDependencies(set);
             for (DbObject obj : set) {
                 if (obj == table) {