removes unnecessary creation of DeviceDataManagerTestAPI

AFAICT these aren't necessary.

BUG=none
TEST=none

Change-Id: Iacda5ff8e2fceebf921ad26d5f074fedb58cd607
Reviewed-on: https://chromium-review.googlesource.com/827538Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524320}

chrome/browser/chromeos/lock_screen_apps/state_controller_unittest.cc

@@ -778,8 +778,6 @@ TEST_F(LockScreenAppStateKioskUserTest, SetPrimaryProfile) {
 
 TEST_F(LockScreenAppStateNoStylusInputTest,
        StylusDetectedAfterInitializationAndScreenLock) {
-  ui::test::DeviceDataManagerTestAPI devices_test_api;
-
   ASSERT_TRUE(InitializeNoteTakingApp(TrayActionState::kNotAvailable, true));
   EXPECT_EQ(TestAppManager::State::kStopped, app_manager()->state());
   EXPECT_TRUE(LockScreenItemStorage::GetIfAllowed(profile()));
@@ -804,8 +802,6 @@ TEST_F(LockScreenAppStateNoStylusInputTest,
 }
 
 TEST_F(LockScreenAppStateNoStylusInputTest, StylusDetectedAfterInitialization) {
-  ui::test::DeviceDataManagerTestAPI devices_test_api;
-
   ASSERT_TRUE(InitializeNoteTakingApp(TrayActionState::kNotAvailable, true));
   EXPECT_EQ(TestAppManager::State::kStopped, app_manager()->state());
 
@@ -1203,7 +1199,6 @@ TEST_F(LockScreenAppStateTest, HandleActionWithLaunchFailure) {
 
 TEST_F(LockScreenAppStateWebUiLockTest,
        LaunchActionWhenStylusRemoved_ActionClosedBeforeAnimationDone) {
-  ui::test::DeviceDataManagerTestAPI devices_test_api;
   ASSERT_TRUE(InitializeNoteTakingApp(TrayActionState::kAvailable,
                                       true /* enable_app_launch */));
   tray_action()->SendNewNoteRequest(LockScreenNoteOrigin::kStylusEject);