Update AbstractValueTest.java

Author: bvkatwijk

vavr/src/test/java/io/vavr/AbstractValueTest.java

@@ -35,7 +35,6 @@
 import java.util.Comparator;
 import java.util.NoSuchElementException;
 import java.util.Optional;
-import java.util.Random;
 import java.util.function.Function;
 import java.util.function.Supplier;
 import org.assertj.core.api.BooleanAssert;