ethernet: remove enable/disable interface unit test

This unit test is not particularly useful and there is already coverage
in EthernetManagerTest.

Test: test only change.
Change-Id: I6f9d19d9603229553f44d562ff0276567cb0e26d
diff --git a/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java b/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
index 082a016..c877865 100644
--- a/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
+++ b/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
@@ -353,22 +353,6 @@
     }
 
     @Test
-    public void testEnableInterfaceCorrectlyCallsFactory() {
-        tracker.enableInterface(TEST_IFACE, NULL_CB);
-        waitForIdle();
-
-        verify(mFactory).updateInterfaceLinkState(eq(TEST_IFACE), eq(true /* up */));
-    }
-
-    @Test
-    public void testDisableInterfaceCorrectlyCallsFactory() {
-        tracker.disableInterface(TEST_IFACE, NULL_CB);
-        waitForIdle();
-
-        verify(mFactory).updateInterfaceLinkState(eq(TEST_IFACE), eq(false /* up */));
-    }
-
-    @Test
     public void testIsValidTestInterfaceIsFalseWhenTestInterfacesAreNotIncluded() {
         final String validIfaceName = TEST_TAP_PREFIX + "123";
         tracker.setIncludeTestInterfaces(false);