Revert "Mark 2 libcore tests as failing."

This reverts commit d9486f963302512dc1cfd9fb0898a864dee51902.

Change-Id: I3afd4aff0667392da0c912c160fd5a39a1f8819d
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index 81ea79a..9a8b462 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -159,13 +159,6 @@
   bug: 22786792
 },
 {
-  description: "Formatting failures",
-  result: EXEC_FAILED,
-  names: ["libcore.java.text.NumberFormatTest#test_currencyFromLocale",
-          "libcore.java.text.NumberFormatTest#test_currencyWithPatternDigits"],
-  bug: 25136848
-},
-{
   description: "Lack of IPv6 on some buildbot slaves",
   result: EXEC_FAILED,
   names: ["libcore.io.OsTest#test_byteBufferPositions_sendto_recvfrom_af_inet6",