remove do not show warning on very first start

src/main/java/com/owncloud/android/providers/FileContentProvider.java

@@ -43,13 +43,11 @@ import android.text.TextUtils;
 import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.datamodel.OCFile;
-import com.owncloud.android.db.PreferenceManager;
 import com.owncloud.android.db.ProviderMeta;
 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
 import com.owncloud.android.lib.common.accounts.AccountUtils;
 import com.owncloud.android.lib.common.utils.Log_OC;
 import com.owncloud.android.lib.resources.shares.ShareType;
-import com.owncloud.android.ui.activity.FileDisplayActivity;
 import com.owncloud.android.utils.FileStorageUtils;
 import com.owncloud.android.utils.MimeType;
 
@@ -692,8 +690,6 @@ public class FileContentProvider extends ContentProvider {
             // Create filesystem table
             createFileSystemTable(db);
 
-            PreferenceManager.getDefaultSharedPreferences(getContext()).edit()
-                    .putBoolean(FileDisplayActivity.KEY_SHOW_ACCOUNT_WARNING, false).apply();
         }
 
         @Override