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
Change-Id: I91f89782b9b989fa1a49e666bb5ce2df3a0dbbf7
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