sem_remove
Description
bool sem_remove ( resource sem_identifier )
     sem_remove() removes the semaphore
     sem_identifier if it
     has been created by sem_get(), 
     otherwise generates a warning.
    
Zwraca TRUE w przypadku sukcesu, FALSE w przypadku porażki.
After removing the semaphore, it is no more accessible.
See also sem_get(), sem_release() and sem_acquire().