Revert "Add tests to expected failures."

This reverts commit 06b173cd2e6663eda0e3d3af23ad153b26e88877.

Reason for revert: aosp/1699345 is a proper fix.

Change-Id: If2ac5352edf630212b4e68f4fe4722030116c618
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index ac77314..1280038 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -283,14 +283,5 @@
           "libcore.javax.net.ssl.DefaultHostnameVerifierTest#testSubjectWithWildAltNamesCert",
           "libcore.javax.net.ssl.DefaultHostnameVerifierTest#testWildAltNameOnlyCert"],
   bug: 166619732
-},
-{
-  description: "Flakey tests",
-  result: EXEC_FAILED,
-  names: ["libcore.libcore.util.NativeAllocationRegistryTest#testNativeAllocationMallocNoSharedRegistry",
-          "libcore.libcore.util.NativeAllocationRegistryTest#testNativeAllocationMallocSharedRegistry",
-          "libcore.libcore.util.NativeAllocationRegistryTest#testNativeAllocationNonmallocNoSharedRegistry",
-          "libcore.libcore.util.NativeAllocationRegistryTest#testNativeAllocationNonmallocSharedRegistry"],
-  bug: 160885166
 }
 ]