Remove duplicate entry with libcore/expectations/knownfailures.txt

Bug: 62408076
Bug: 68033708
Change-Id: I63879c5f85f37c1337d0c6520ae7926191956d88
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index fc07d6a..23a70f7 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -211,13 +211,6 @@
           "libcore.java.lang.ProcessBuilderTest#testRedirect_nullStreams"]
 },
 {
-  description: "Repeated annotations do not work in javac (OpenJDK8), fixed in OpenJDK9.
-                Blacklisted to support javac/dx build (b/36902714)",
-  result: EXEC_FAILED,
-  bug: 62408076,
-  names: ["libcore.java.lang.reflect.annotations.AnnotatedElementParameterTest#testImplicitConstructorParameters_singleAnnotation"]
-},
-{
   description: "java.io.IOException: Error writing ASN.1 encoding",
   result: EXEC_FAILED,
   names: ["libcore.javax.crypto.spec.AlgorithmParametersTestGCM#testEncoding"]