Get rid of derivation code, since it's handled elsewhere (in the scanner).
Get rid of derivation code, since it's handled elsewhere (in the scanner).

	* src/parser/ugrammar.y: Remove commented code.

urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi