hmp: Drop a bogus sentence from set_password's documentation

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20210909081219.308065-3-armbru@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

hmp-commands.hx

@@ -1522,12 +1522,11 @@ ERST
 
 SRST
 ``set_password [ vnc | spice ] password [ action-if-connected ]``
-  Change spice/vnc password.  Use zero to make the password stay valid
-  forever.  *action-if-connected* specifies what should happen in
-  case a connection is established: *fail* makes the password change
-  fail.  *disconnect* changes the password and disconnects the
-  client.  *keep* changes the password and keeps the connection up.
-  *keep* is the default.
+  Change spice/vnc password.  *action-if-connected* specifies what
+  should happen in case a connection is established: *fail* makes the
+  password change fail.  *disconnect* changes the password and
+  disconnects the client.  *keep* changes the password and keeps the
+  connection up.  *keep* is the default.
 ERST
 
     {