Remove top-level const qualifiers in function declarations

Signed-off-by: LocalSpook <56512186+LocalSpook@users.noreply.github.com>

launcher/InstanceImportTask.h

@@ -54,7 +54,7 @@ class FileResolvingTask;
 class InstanceImportTask : public InstanceTask {
     Q_OBJECT
    public:
-    explicit InstanceImportTask(const QUrl sourceUrl, QWidget* parent = nullptr, QMap<QString, QString>&& extra_info = {});
+    explicit InstanceImportTask(const QUrl& sourceUrl, QWidget* parent = nullptr, QMap<QString, QString>&& extra_info = {});
 
     bool abort() override;
     const QVector<Flame::File>& getBlockedFiles() const { return m_blockedMods; }