Fix flex build error

src/parser/parser.ll

@@ -1,5 +1,6 @@
 
 %option nounput
+%option noyywrap
 %option bison-locations
 
 %{

src/parser/parser.yy

@@ -19,11 +19,6 @@ extern FILE * yyin;
 
 void errFunc(const char * str, YYLTYPE * yyllocp);
 
-int yywrap()
-{
-    return 1;
-}
-
 static refptr<Node> parsed_scene_node;
 refptr<Scope> parser_scope;