src: remove duplicate assignment of O_EXCL in node_constants.cc

PR-URL: https://github.com/nodejs/node/pull/59049
Reviewed-By: theanarkh <theratliter@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

src/node_constants.cc

@@ -1105,10 +1105,6 @@ NODE_DEFINE_CONSTANT(target, UV_FS_O_FILEMAP);
   NODE_DEFINE_CONSTANT(target, O_DIRECTORY);
 #endif
 
-#ifdef O_EXCL
-  NODE_DEFINE_CONSTANT(target, O_EXCL);
-#endif
-
 #ifdef O_NOATIME
   NODE_DEFINE_CONSTANT(target, O_NOATIME);
 #endif