remove useless import in ObserverService

app/src/main/java/foundation/e/drive/services/ObserverService.java

@@ -30,14 +30,11 @@ import com.owncloud.android.lib.resources.files.model.RemoteFile;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileOutputStream;
-import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.Map;
-import java.util.stream.Stream;
 
 import foundation.e.drive.database.DbHelper;
 import foundation.e.drive.fileFilters.CrashlogsFileFilter;