Remove redundant function "enclose_in_scope".
Remove redundant function "enclose_in_scope".

"ast_scope" provides the same functionality as "enclose_in_scope".

	* src/parser/ugrammar.y (enclose_in_scope): Remove.
	Replace uses of "enclose_in_scope" by "ast_scope".

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