backends/x11: Manage X11WindowedQPainterOutput using std::unique_ptr

src/backends/x11/windowed/scene_qpainter_x11_backend.cpp

@@ -70,12 +70,12 @@ X11WindowedQPainterBackend::~X11WindowedQPainterBackend()
 
 void X11WindowedQPainterBackend::addOutput(Output *output)
 {
-    m_outputs[output] = std::make_shared<X11WindowedQPainterOutput>(output, m_backend->windowForScreen(output));
+    m_outputs[output] = std::make_unique<X11WindowedQPainterOutput>(output, m_backend->windowForScreen(output));
 }
 
 void X11WindowedQPainterBackend::removeOutput(Output *output)
 {
-    m_outputs.remove(output);
+    m_outputs.erase(output);
 }
 
 void X11WindowedQPainterBackend::present(Output *output)

src/backends/x11/windowed/scene_qpainter_x11_backend.h

@@ -12,9 +12,9 @@
 #include "qpainterbackend.h"
 
 #include <QImage>
-#include <QMap>
 #include <QObject>
 #include <QVector>
+
 #include <memory>
 
 #include <xcb/xcb.h>
@@ -55,7 +55,7 @@ private:
 
     xcb_gcontext_t m_gc = XCB_NONE;
     X11WindowedBackend *m_backend;
-    QMap<Output *, std::shared_ptr<X11WindowedQPainterOutput>> m_outputs;
+    std::map<Output *, std::unique_ptr<X11WindowedQPainterOutput>> m_outputs;
 };
 
 } // namespace KWin