stm32/eth: Remove unused configured_phy_speed field.

The configured_phy_speed field was only written but never read. The
boolean mac_speed_configured alone is sufficient to track whether MAC
speed/duplex has been configured.

This removes 3 assignments and the uint16_t field from the eth_t struct.

Signed-off-by: Andrew Leech <[email protected]>

Author: pi-anl

ports/stm32/eth.c

@@ -123,7 +123,6 @@ typedef struct _eth_t {
     bool last_link_status;
     bool enabled;
     bool mac_speed_configured;
-    uint16_t configured_phy_speed;
     uint32_t autoneg_start_ms;
     volatile bool mac_reconfig_in_progress;
 } eth_t;
@@ -915,7 +914,6 @@ void eth_phy_link_status_poll() {
 
             // Mark as configured
             self->mac_speed_configured = true;
-            self->configured_phy_speed = phy_speed;
 
             // Restart DHCP if no static IP configured (since MAC was reconfigured)
             struct netif *netif = &self->netif;
@@ -1088,7 +1086,6 @@ static int eth_phy_init(eth_t *self) {
     // Initialize link status tracking (current state, whatever it is)
     self->last_link_status = false;
     self->mac_speed_configured = false;
-    self->configured_phy_speed = 0;
     eth_phy_link_status_poll();
 
     return 0;