Fixes after crossed review

src/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -154,8 +154,6 @@ OnSslUntrustedCertListener, OnEnforceableRefreshListener {
 
     private OCFile mWaitingToSend;
     
-    private Boolean mUnlocked = false;
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         Log_OC.v(TAG, "onCreate() start");

src/com/owncloud/android/ui/preview/PreviewImageActivity.java

@@ -40,7 +40,6 @@ import com.actionbarsherlock.view.Window;
 import com.ortiz.touch.ExtendedViewPager;
 import com.owncloud.android.R;
 import com.owncloud.android.authentication.AccountUtils;
-import com.owncloud.android.authentication.PassCodeManager;
 import com.owncloud.android.datamodel.FileDataStorageManager;
 import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.files.services.FileDownloader;
@@ -88,9 +87,7 @@ ViewPager.OnPageChangeListener, OnRemoteOperationListener {
     
     private View mFullScreenAnchorView;
     
-    private Boolean mUnlocked = false;
-    
-    
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);