igb: Remove obsolete workaround for Windows

I confirmed it works with Windows even without this workaround. It is
likely to be a mistake so remove it.

Fixes: 3a977deebe ("Intrdocue igb device emulation")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

hw/net/igb_core.c

@@ -2678,12 +2678,7 @@ static uint32_t igb_get_status(IGBCore *core, int index)
         res |= E1000_STATUS_IOV_MODE;
     }
 
-    /*
-     * Windows driver 12.18.9.23 resets if E1000_STATUS_GIO_MASTER_ENABLE is
-     * left set after E1000_CTRL_LRST is set.
-     */
-    if (!(core->mac[CTRL] & E1000_CTRL_GIO_MASTER_DISABLE) &&
-        !(core->mac[CTRL] & E1000_CTRL_LRST)) {
+    if (!(core->mac[CTRL] & E1000_CTRL_GIO_MASTER_DISABLE)) {
         res |= E1000_STATUS_GIO_MASTER_ENABLE;
     }