C++: Store token kind as lexer state

... when needed

Change-Id: I32a1649c87e1fa42da80eff5003b2f5714062064
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/3rdparty/cplusplus/Lexer.h

@@ -32,12 +32,6 @@ class CPLUSPLUS_EXPORT Lexer
     void operator =(const Lexer &other);
 
 public:
-    enum State {
-        State_Default,
-        State_MultiLineComment,
-        State_MultiLineDoxyComment
-    };
-
     Lexer(TranslationUnit *unit);
     Lexer(const char *firstChar, const char *lastChar);
     ~Lexer();