Remove TOKEN_DECODE_ERROR

assets/parser.d.erb

@@ -22,8 +22,6 @@ class <%= @classname %>
 <%   end %>
 <% end %>
         _TOKEN_COUNT = <%= @grammar.tokens.size %>,
-        _TOKEN_DECODE_ERROR = <%= TOKEN_DECODE_ERROR %>,
-        _TOKEN_DROP = <%= TOKEN_DROP %>,
     }
 
     struct Token
@@ -408,7 +406,6 @@ class <%= @classname %>
                 if (decoded.is_decode_error())
                 {
                     result.type = Result.Type.DECODE_ERROR;
-                    result.token = _TOKEN_DECODE_ERROR;
                     return;
                 }
                 bool lex_continue = false;

lib/propane.rb

@@ -25,12 +25,6 @@ require_relative "propane/version"
 
 class Propane
 
-  # Decoding error.
-  TOKEN_DECODE_ERROR = 0xFFFFFFFD
-
-  # Token ID for a "dropped" token.
-  TOKEN_DROP = 0xFFFFFFFE
-
   class Error < RuntimeError
   end