Removing workaround for battery defender

The bug is supposed to be fixed.

Bug: 151613234
Change-Id: I8e803ead29e08e68fa75f61b5ad0e1198c9228ec
(cherry picked from commit ff39fd3e14329db22ef34da32b9116fbe39af6f1)
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index e118481..d3fc89e 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -234,25 +234,11 @@
         return mDevice;
     }
 
-    private boolean hasSystemUiObject(String resId) {
-        return mDevice.hasObject(By.res(SYSTEMUI_PACKAGE, resId));
-    }
-
     @Before
     public void setUp() throws Exception {
-        Log.d(TAG, "Before disabling battery defender");
-        mDevice.executeShellCommand("setprop vendor.battery.defender.disable 1");
-        Log.d(TAG, "Before enabling stay awake");
-        mDevice.executeShellCommand("settings put global stay_on_while_plugged_in 3");
-        for (int i = 0; i < 10 && hasSystemUiObject("keyguard_status_view"); ++i) {
-            Log.d(TAG, "Before unlocking the phone");
-            mDevice.executeShellCommand("input keyevent 82");
-            mDevice.waitForIdle();
-        }
-        Assert.assertTrue("Keyguard still visible",
+        Assert.assertTrue("Keyguard is visible",
                 mDevice.wait(
                         Until.gone(By.res(SYSTEMUI_PACKAGE, "keyguard_status_view")), 60000));
-        Log.d(TAG, "Keyguard is not visible");
 
         final String launcherPackageName = mDevice.getLauncherPackageName();
         try {