Drop Screens::supportsTransformations

It's used nowhere.

plugins/platforms/drm/drm_output.cpp

@@ -1049,17 +1049,6 @@ bool DrmOutput::atomicReqModesetPopulate(drmModeAtomicReq *req, bool enable)
     return ret;
 }
 
-bool DrmOutput::supportsTransformations() const
-{
-    if (!m_primaryPlane) {
-        return false;
-    }
-    const auto transformations = m_primaryPlane->supportedTransformations();
-    return transformations.testFlag(DrmPlane::Transformation::Rotate90)
-        || transformations.testFlag(DrmPlane::Transformation::Rotate180)
-        || transformations.testFlag(DrmPlane::Transformation::Rotate270);
-}
-
 int DrmOutput::gammaRampSize() const
 {
     return m_crtc->gammaRampSize();

plugins/platforms/drm/drm_output.h

@@ -83,8 +83,6 @@ public:
 
     bool initCursor(const QSize &cursorSize);
 
-    bool supportsTransformations() const;
-
     /**
      * Drm planes might be capable of realizing the current output transform without usage
      * of compositing. This is a getter to query the current state of that

plugins/platforms/drm/screens_drm.cpp

@@ -8,14 +8,12 @@
 */
 #include "screens_drm.h"
 #include "drm_backend.h"
-#include "drm_output.h"
 
 namespace KWin
 {
 
 DrmScreens::DrmScreens(DrmBackend *backend, QObject *parent)
     : OutputScreens(backend, parent)
-    , m_backend(backend)
 {
     connect(backend, &DrmBackend::screensQueried, this, &DrmScreens::updateCount);
     connect(backend, &DrmBackend::screensQueried, this, &DrmScreens::changed);
@@ -23,13 +21,4 @@ DrmScreens::DrmScreens(DrmBackend *backend, QObject *parent)
 
 DrmScreens::~DrmScreens() = default;
 
-bool DrmScreens::supportsTransformations(int screen) const
-{
-    const auto enOuts = m_backend->drmEnabledOutputs();
-    if (screen >= enOuts.size()) {
-        return false;
-    }
-    return enOuts.at(screen)->supportsTransformations();
-}
-
 }

plugins/platforms/drm/screens_drm.h

@@ -20,10 +20,6 @@ class DrmScreens : public OutputScreens
 public:
     DrmScreens(DrmBackend *backend, QObject *parent = nullptr);
     ~DrmScreens() override;
-
-    bool supportsTransformations(int screen) const override;
-
-    DrmBackend *m_backend;
 };
 
 }

screens.cpp

@@ -201,12 +201,6 @@ bool Screens::isInternal(int screen) const
     return false;
 }
 
-bool Screens::supportsTransformations(int screen) const
-{
-    Q_UNUSED(screen)
-    return false;
-}
-
 Qt::ScreenOrientation Screens::orientation(int screen) const
 {
     Q_UNUSED(screen)

screens.h

@@ -127,12 +127,6 @@ public:
      */
     virtual bool isInternal(int screen) const;
 
-    /**
-     * @returns @c true if the @p screen can be rotated.
-     * Default implementation returns @c false
-     */
-    virtual bool supportsTransformations(int screen) const;
-
     virtual Qt::ScreenOrientation orientation(int screen) const;
 
     int physicalDpiX(int screen) const;