Small cleanup

src/monitor/scopes/sharedframe.cpp

@@ -201,7 +201,3 @@ const int16_t *SharedFrame::get_audio() const
     return (int16_t *)d->f.get_audio(format, frequency, channels, samples);
 }
 
-Mlt::Frame &SharedFrame::get_frame() const
-{
-    return d->f;
-}

src/monitor/scopes/sharedframe.h

@@ -52,7 +52,6 @@ public:
     SharedFrame(const SharedFrame &other);
     ~SharedFrame();
     SharedFrame &operator=(const SharedFrame &other);
-    Mlt::Frame &get_frame() const;
 
     bool is_valid() const;
     Mlt::Frame clone(bool audio = false, bool image = false, bool alpha = false) const;