al_remove_opengl_fbo - Allegro 5 API

       Explicitly  free  an  OpenGL  FBO  created for a bitmap, if it has one.  Usually you do not need to worry
       about freeing FBOs, unless you use al_get_opengl_fbo(3alleg5).

       al_remove_opengl_fbo - Allegro 5 API

al_get_opengl_fbo(3alleg5), al_set_target_bitmap(3alleg5)

Allegro reference manual                                                           al_remove_opengl_fbo(3alleg5)

              #include <allegro5/allegro_opengl.h>

              void al_remove_opengl_fbo(ALLEGRO_BITMAP *bitmap)