net: dsa: Remove fixed_link_update member

We have not had a switch driver use a fixed_link_update callback since
58d56fcc39 ("net: dsa: bcm_sf2: Get rid of
PHYLIB functions") remove this callback.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20240430164816.2400606-2-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/dsa.h

@@ -25,7 +25,6 @@
 struct dsa_8021q_context;
 struct tc_action;
 struct phy_device;
-struct fixed_phy_status;
 struct phylink_link_state;
 
 #define DSA_TAG_PROTO_NONE_VALUE		0
@@ -873,9 +872,6 @@ struct dsa_switch_ops {
 	 */
 	void	(*adjust_link)(struct dsa_switch *ds, int port,
 				struct phy_device *phydev);
-	void	(*fixed_link_update)(struct dsa_switch *ds, int port,
-				struct fixed_phy_status *st);
-
 	/*
 	 * PHYLINK integration
 	 */