Remove broken test testRfc6724Sort

This test is conitnuely fail in cuttlefish.
Lack of ipv6 default route in cuttlefish caused the test failed.
The reason is that the result of rfc6724Sort depends on on the route in system.
It is not good to expect any route should exists, so remove it.

Bug: 133649648
Test: atest DnsUtilsTest

Merged-In: Idc6db433585de067e45088b43665c8e37b310397
(cherry picked from commit 91b35f88429d77ddce0e3f539690e6370b89915b)

Change-Id: Idb6f4c094d3466772e3bfc98a57505bf38f381ef
diff --git a/tests/net/java/android/net/util/DnsUtilsTest.java b/tests/net/java/android/net/util/DnsUtilsTest.java
index e5cb09f..42e340b 100644
--- a/tests/net/java/android/net/util/DnsUtilsTest.java
+++ b/tests/net/java/android/net/util/DnsUtilsTest.java
@@ -19,7 +19,6 @@
 import static android.net.util.DnsUtils.IPV6_ADDR_SCOPE_GLOBAL;
 import static android.net.util.DnsUtils.IPV6_ADDR_SCOPE_LINKLOCAL;
 import static android.net.util.DnsUtils.IPV6_ADDR_SCOPE_SITELOCAL;
-import static android.net.util.DnsUtils.rfc6724Sort;
 
 import static org.junit.Assert.assertEquals;
 
@@ -56,24 +55,6 @@
     }
 
     @Test
-    public void testRfc6724Sort() {
-        final List<InetAddress> testAddresses = Arrays.asList(
-                stringToAddress("172.217.24.14"),
-                stringToAddress("216.58.200.46"),
-                stringToAddress("2404:6800:4008:802::200e"));
-
-        final List<InetAddress> expected = Arrays.asList(
-                stringToAddress("2404:6800:4008:802::200e"),
-                stringToAddress("172.217.24.14"),
-                stringToAddress("216.58.200.46"));
-
-        final List<InetAddress> result = rfc6724Sort(null, testAddresses);
-
-        assertEquals(result.size(), testAddresses.size());
-        assertEquals(result, expected);
-    }
-
-    @Test
     public void testRfc6724Comparator() {
         final List<DnsUtils.SortableAddress> test = Arrays.asList(
                 makeSortableAddress("216.58.200.36"),             // Ipv4