device: Drop unused function dev_find_matching_device_on_bus

With use of device pointers, `dev_find_matching_device_on_bus()` is
now unused and hence this change drops the function.

Change-Id: I30fcb2d9932d770ca614cceffb15646ce8256465
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57846
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/device/device_const.c

@@ -70,19 +70,6 @@ DEVTREE_CONST struct device *dev_find_path(
 	return result;
 }
 
-DEVTREE_CONST struct device *dev_find_matching_device_on_bus(const struct bus *bus,
-							match_device_fn fn)
-{
-	DEVTREE_CONST struct device *child = NULL;
-
-	while ((child = dev_bus_each_child(bus, child)) != NULL) {
-		if (fn(child))
-			break;
-	}
-
-	return child;
-}
-
 /**
  * Given a device pointer, find the next PCI device.
  *