rpm-ostree: remove usage of reviews

We don't want reviews. At least not until rpm-ostree images don't have a
standard appstream ids.

libdiscover/backends/RpmOstreeBackend/RpmOstreeBackend.cpp

@@ -76,7 +76,6 @@ private:
 
 RpmOstreeBackend::RpmOstreeBackend(QObject *parent)
     : AbstractResourcesBackend(parent)
-    , m_reviews(AppStreamIntegration::global()->reviews())
     , m_updater(new StandardBackendUpdater(this))
     , m_fetching(false)
     , m_isDeploymentUpdate(true)
@@ -316,11 +315,6 @@ AbstractBackendUpdater *RpmOstreeBackend::backendUpdater() const
     return m_updater;
 }
 
-AbstractReviewsBackend *RpmOstreeBackend::reviewsBackend() const
-{
-    return m_reviews.data();
-}
-
 QString RpmOstreeBackend::displayName() const
 {
     return QStringLiteral("rpm-ostree");

libdiscover/backends/RpmOstreeBackend/RpmOstreeBackend.h

@@ -17,10 +17,6 @@
 #include <QThreadPool>
 #include <QtDBus/QDBusPendingReply>
 
-#include <AppStreamQt/component.h>
-#include <appstream/AppStreamIntegration.h>
-#include <appstream/OdrsReviewsBackend.h>
-
 class RpmOstreeReviewsBackend;
 class OdrsReviewsBackend;
 class RpmOstreeResource;
@@ -74,7 +70,10 @@ public:
 
     int updatesCount() const override;
     AbstractBackendUpdater *backendUpdater() const override;
-    AbstractReviewsBackend *reviewsBackend() const override;
+    AbstractReviewsBackend *reviewsBackend() const override
+    {
+        return nullptr;
+    }
     ResultsStream *search(const AbstractResourcesBackend::Filters &search) override;
 
     // return true when OSTreeRPMBackend is ready to be loaded
@@ -95,7 +94,6 @@ public Q_SLOTS:
     void toggleFetching();
 
 private:
-    QSharedPointer<OdrsReviewsBackend> m_reviews;
     StandardBackendUpdater *m_updater;
     QVector<RpmOstreeResource *> m_resources;