Don't bind RetroPad R3 to 'F3' key - libretro frontend should be able to soft-reset with F3 through retro_reset

Author: inactive123

src/osd/retro/retromain.c

@@ -996,7 +996,6 @@ static void initInput(running_machine &machine)
       input_device_item_add_pad (i,Buttons_Name[RETROPAD_L2], &joystate[i].button[RETROPAD_L2],(input_item_id)(ITEM_ID_TAB+0),retrokbd_get_state );
       input_device_item_add_pad (i,Buttons_Name[RETROPAD_R2], &joystate[i].button[RETROPAD_R2],(input_item_id)(ITEM_ID_F11+0),retrokbd_get_state );
       input_device_item_add_pad (i,Buttons_Name[RETROPAD_L3], &joystate[i].button[RETROPAD_L3],(input_item_id)(ITEM_ID_F2+0),retrokbd_get_state );
-      input_device_item_add_pad (i,Buttons_Name[RETROPAD_R3], &joystate[i].button[RETROPAD_R3],(input_item_id)(ITEM_ID_F3+0),retrokbd_get_state );
 
       input_device_item_add_pad (i,Buttons_Name[RETROPAD_PAD_UP]   , &joystate[i].button[RETROPAD_PAD_UP]   ,PAD_DIR[i][0],retrokbd_get_state );
       input_device_item_add_pad (i,Buttons_Name[RETROPAD_PAD_DOWN] , &joystate[i].button[RETROPAD_PAD_DOWN] ,PAD_DIR[i][1],retrokbd_get_state );