Remove duplicate spliterator tests

The tests:

test/java/util/stream/test/org/openjdk/tests/java/util/stream/SpliteratorTraversingAndSplittingTest.java
test/java/util/stream/test/org/openjdk/tests/java/util/stream/SpliteratorLateBindingFailFastTest.java

are duplicates of:

test/java/util/Spliterator/SpliteratorTraversingAndSplittingTest.java
test/java/util/Spliterator/SpliteratorLateBindingFailFastTest.java