Not necessary to use Q_SLOTS here

resources/mbox/compactpage.h

@@ -19,7 +19,7 @@ class CompactPage : public QWidget
 public:
     explicit CompactPage(const QString &collectionId, QWidget *parent = nullptr);
 
-private Q_SLOTS:
+private:
     void compact();
     void onCollectionFetchCheck(KJob *);
     void onCollectionFetchCompact(KJob *);

resources/mbox/mboxresource.h

@@ -40,11 +40,9 @@ protected:
 
     Q_REQUIRED_RESULT Akonadi::Collection rootCollection() const override;
 
-private Q_SLOTS:
+private:
     void onCollectionFetch(KJob *job);
     void onCollectionModify(KJob *job);
-
-private:
     QHash<KJob *, Akonadi::Item> mCurrentItemDeletions;
     KMBox::MBox *mMBox = nullptr;
 };