java imports, unused java been removed...

src/main/java/com/owncloud/android/ui/dialog/ExpirationDatePickerDialogFragment.java

@@ -24,7 +24,6 @@ package com.owncloud.android.ui.dialog;
 
 import android.app.DatePickerDialog;
 import android.app.Dialog;
-import android.content.DialogInterface;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.v4.app.DialogFragment;
@@ -35,7 +34,6 @@ import com.owncloud.android.R;
 import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.lib.resources.shares.OCShare;
 import com.owncloud.android.ui.activity.FileActivity;
-import com.owncloud.android.utils.ThemeUtils;
 
 import java.util.Calendar;