doc: remove IRC from man page

PR-URL: #53344
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Moshe Atlow <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Mohammed Keyvanzadeh <[email protected]>
Reviewed-By: Chengzhong Wu <[email protected]>
Reviewed-By: Ulises Gascón <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>

Author: tniessen

doc/node.1

@@ -812,8 +812,3 @@ Documentation:
 .Pp
 GitHub repository and issue tracker:
 .Sy https://github.com/nodejs/node
-.
-.Pp
-IRC (general questions):
-.Sy "libera.chat #node.js"
-(unofficial)