core/output: remove direct scanout inhibition

It's not used anywhere

src/compositor.cpp

@@ -184,7 +184,7 @@ void Compositor::composite(RenderLoop *renderLoop)
             const bool scanoutPossible = std::none_of(sublayers.begin(), sublayers.end(), [](RenderLayer *sublayer) {
                 return sublayer->isVisible();
             });
-            if (scanoutPossible && !output->directScanoutInhibited()) {
+            if (scanoutPossible) {
                 directScanout = primaryLayer->scanout(scanoutCandidate);
             }
         }

src/core/output.cpp

@@ -401,21 +401,6 @@ bool Output::isInternal() const
     return m_information.internal;
 }
 
-void Output::inhibitDirectScanout()
-{
-    m_directScanoutCount++;
-}
-
-void Output::uninhibitDirectScanout()
-{
-    m_directScanoutCount--;
-}
-
-bool Output::directScanoutInhibited() const
-{
-    return m_directScanoutCount;
-}
-
 std::chrono::milliseconds Output::dimAnimationTime()
 {
     // See kscreen.kcfg

src/core/output.h

@@ -290,11 +290,6 @@ public:
      */
     virtual RenderLoop *renderLoop() const = 0;
 
-    void inhibitDirectScanout();
-    void uninhibitDirectScanout();
-
-    bool directScanoutInhibited() const;
-
     /**
      * @returns the configured time for an output to dim
      *
@@ -477,7 +472,6 @@ protected:
     State m_state;
     Information m_information;
     QUuid m_uuid;
-    int m_directScanoutCount = 0;
     int m_refCount = 1;
 };