Share SDL's EGL display with EGLRenderer

Fixes #1396

app/streaming/video/ffmpeg-renderers/eglvid.h

@@ -31,7 +31,6 @@ private:
     const float *getColorOffsets(const AVFrame* frame);
     const float *getColorMatrix(const AVFrame* frame);
     static int loadAndBuildShader(int shaderType, const char *filename);
-    bool openDisplay(unsigned int platform, void* nativeDisplay);
 
     AVPixelFormat m_EGLImagePixelFormat;
     void *m_EGLDisplay;