[master] a45d8afcf doc: Remove stale reference to VSM_Name()

[Dridi Boukelmoune]

commit a45d8afcf937c58dd00ce1abc4bd51af34bebbcc
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Thu Aug 4 08:48:46 2022 +0200

    doc: Remove stale reference to VSM_Name()
    
    It disappeared from libvarnishapi during the 2.0 soname bump.
    
    Refs 74328de8eeb2703591fe59190f73fcabf057adbe
    Refs 07d4e752952eee1151257a71a7ad310bc3b1a3e0

diff --git a/doc/sphinx/reference/varnishd.rst b/doc/sphinx/reference/varnishd.rst
index cdb08d40e..b97a6f374 100644
--- a/doc/sphinx/reference/varnishd.rst
+++ b/doc/sphinx/reference/varnishd.rst
@@ -216,8 +216,8 @@ Operations options
 -i identity
 
   Specify the identity of the Varnish server. This can be accessed
-  using ``server.identity`` from VCL and with VSM_Name() from
-  utilities.  If not specified the output of gethostname(3) is used.
+  using ``server.identity`` from VCL. If not specified the output of
+  gethostname(3) is used.
 
 -I clifile