add remove driver function

models/drivers.go

@@ -19,3 +19,11 @@ func (d *Drivers) AddDriver(drv *Driver) {
 	}
 	(*d)[drv.Type] = drv
 }
+
+func (d *Drivers) RemoveDriver(drv *Driver) {
+	if driver, ok := (*d)[drv.Type]; ok {
+		driver.RemoveBuses(drv.Buses)
+		(*d)[drv.Type] = driver
+		return
+	}
+}