CLI2: Removed obsolete ::isUUIDList

- Removed unsupported UUID lists, which shoudl have been removed earlier when
  Lexer::Type::list was dropped.
- Reversed logic in 'if' statements to perform the lowest cost comparison first.

src/CLI2.h

@@ -105,10 +105,6 @@ private:
   void decomposeModTags ();
   void decomposeModSubstitutions ();
 
-/*
-  bool isUUIDList       (const std::string&) const;
-*/
-
 public:
   std::multimap <std::string, std::string>           _entities;
   std::map <std::string, std::string>                _aliases;