Remove duplicate test expectation entry.

The entry was already in art/tools/libcore_gcstress_failures.txt

Test: run-libcore-tests.sh
Change-Id: I298faedc41dbe9c26e52071262bd4996f3bb4811
diff --git a/tools/libcore_gcstress_debug_failures.txt b/tools/libcore_gcstress_debug_failures.txt
index 06f6339..f0e4932 100644
--- a/tools/libcore_gcstress_debug_failures.txt
+++ b/tools/libcore_gcstress_debug_failures.txt
@@ -13,7 +13,6 @@
           "libcore.libcore.icu.RelativeDateTimeFormatterTest#test_bug25821045",
           "libcore.libcore.icu.RelativeDateTimeFormatterTest#test_bug25883157",
           "libcore.java.lang.ref.ReferenceQueueTest#testRemoveWithDelayedResultAndTimeout",
-          "libcore.java.lang.ref.ReferenceQueueTest#testRemoveWithDelayedResultAndNoTimeout",
           "libcore.java.util.TimeZoneTest#testSetDefaultDeadlock",
           "libcore.javax.crypto.CipherBasicsTest#testBasicEncryption",
           "org.apache.harmony.tests.java.util.TimerTest#testThrowingTaskKillsTimerThread"]