ecore_drm2: Remove unused 'fd' field on Ecore_Drm2_Display

This is currently not used for anything, so comment it out for now. If
it's needed later, we can just uncomment

src/lib/ecore_drm2/ecore_drm2_displays.c

@@ -550,7 +550,7 @@ _ecore_drm2_displays_create(Ecore_Drm2_Device *dev)
 
         sym_drmModeFreeCrtc(dcrtc);
 
-        disp->fd = dev->fd;
+        /* disp->fd = dev->fd; */
         disp->conn = c;
 
         /* append this display to the list */

src/lib/ecore_drm2/ecore_drm2_private.h

@@ -239,7 +239,7 @@ struct _Ecore_Drm2_Display_Mode
 
 struct _Ecore_Drm2_Display
 {
-   int fd;
+   /* int fd; */
    int x, y, w, h;
    int pw, ph; // physical dimensions
    Eina_Stringshare *name, *make, *model, *serial;