egl: remove unused Display field

src/egl/main/egldriver.c

@@ -185,7 +185,6 @@ _eglOpenDriver(_EGLDisplay *dpy, const char *driverName, const char *args)
    else
       dlclose(lib);
 
-   drv->Display = dpy;
    return drv;
 }
 

src/egl/main/egldriver.h

@@ -28,8 +28,6 @@ struct _egl_driver
 
    void *LibHandle; /**< dlopen handle */
 
-   _EGLDisplay *Display;
-
    int APImajor, APIminor; /**< as returned by eglInitialize() */
    char Version[10];       /**< initialized from APImajor/minor */