RESTRICT AUTOMERGE: Revert "Wait a bit until mobile network is connected"

This reverts commit 7202446109bebdc6228a009637cb4866489c1c0e.

Reason for revert: Postponed to a later release. The cl introduces invalid #null test failure, which requires additional fixes. Pls re-submit the same CL.

Change-Id: I9bf0581801dd704959886197755681080854557f
diff --git a/tests/tests/telephony/src/android/telephony/cts/SubscriptionManagerTest.java b/tests/tests/telephony/src/android/telephony/cts/SubscriptionManagerTest.java
index 18a18d7..f544694 100644
--- a/tests/tests/telephony/src/android/telephony/cts/SubscriptionManagerTest.java
+++ b/tests/tests/telephony/src/android/telephony/cts/SubscriptionManagerTest.java
@@ -64,44 +64,10 @@
     private int mSubId;
     private String mPackageName;
 
-    /**
-     * Callback used in testRegisterNetworkCallback that allows caller to block on
-     * {@code onAvailable}.
-     */
-    private static class TestNetworkCallback extends ConnectivityManager.NetworkCallback {
-        private final CountDownLatch mAvailableLatch = new CountDownLatch(1);
-
-        public void waitForAvailable() throws InterruptedException {
-            assertTrue("Cellular network did not come up after 5 seconds",
-                    mAvailableLatch.await(5, TimeUnit.SECONDS));
-        }
-
-        @Override
-        public void onAvailable(Network network) {
-            mAvailableLatch.countDown();
-        }
-    }
-
     @BeforeClass
     public static void setUpClass() throws Exception {
         InstrumentationRegistry.getInstrumentation().getUiAutomation()
                 .executeShellCommand("svc wifi disable");
-
-        final TestNetworkCallback callback = new TestNetworkCallback();
-        final ConnectivityManager cm = InstrumentationRegistry.getContext()
-                .getSystemService(ConnectivityManager.class);
-        cm.registerNetworkCallback(new NetworkRequest.Builder()
-                .addTransportType(TRANSPORT_CELLULAR)
-                .addCapability(NET_CAPABILITY_INTERNET)
-                .build(), callback);
-        try {
-            // Wait to get callback for availability of internet
-            callback.waitForAvailable();
-        } catch (InterruptedException e) {
-            fail("NetworkCallback wait was interrupted.");
-        } finally {
-            cm.unregisterNetworkCallback(callback);
-        }
     }
 
     @AfterClass