Remove unused DisplayInfo structure

    void setVsyncEnabled(int32_t disp, HWC2::Vsync enabled);

    struct DisplayConfig {

        uint32_t width;

        uint32_t height;

        float xdpi;

        float ydpi;

        nsecs_t refresh;

        int colorTransform;

    };

    // Query display parameters.  Pass in a display index (e.g.

    // HWC_DISPLAY_PRIMARY).

    nsecs_t getRefreshTimestamp(int32_t disp) const;