Use anonymous namespace for constants

src/covermanager/albumcoverloader.cpp

@@ -46,6 +46,10 @@
 
 using std::make_shared;
 
+namespace {
+constexpr int kMaxRedirects = 3;
+}
+
 AlbumCoverLoader::AlbumCoverLoader(QObject *parent)
     : QObject(parent),
       network_(new NetworkAccessManager(this)),

src/covermanager/albumcoverloader.h

@@ -123,7 +123,6 @@ class AlbumCoverLoader : public QObject {
   void LoadRemoteImageFinished(QNetworkReply *reply, AlbumCoverLoader::TaskPtr task, const AlbumCoverLoaderResult::Type result_type, const QUrl &cover_url);
 
  private:
-  static const int kMaxRedirects = 3;
   SharedPtr<NetworkAccessManager> network_;
   bool stop_requested_;
   QMutex mutex_load_image_async_;