Revert "[RESTRICT AUTOMERGE] Add test to known failures"

This reverts commit 46dea821cd5dfe154fbbc5b44e9acd59c2f3133d.

Reason for revert: Incorrect way to set known failures for libcore module

Change-Id: I563d78f8edb885b05421365f498b9bda4e7ab4fb
diff --git a/tools/cts-tradefed/res/config/cts-known-failures.xml b/tools/cts-tradefed/res/config/cts-known-failures.xml
index 00ec9a8..5d43956 100644
--- a/tools/cts-tradefed/res/config/cts-known-failures.xml
+++ b/tools/cts-tradefed/res/config/cts-known-failures.xml
@@ -207,6 +207,4 @@
     <!-- test fails if usb charging is disabled which is not mandatory -->
     <option name="compatibility:exclude-filter" value="CtsDumpsysHostTestCases  android.dumpsys.cts.StoragedDumpsysTest#testStoragedOutput" />
 
-    <!-- b/177953386 -->
-    <option name="compatibility:exclude-filter" value="CtsLibcoreTestCases  libcore.javax.net.ssl.DefaultHostnameVerifierTest#testSubjectOnlyCert" />
 </configuration>