Remove completed TODO

TODO for serial number support should be removed now that the feature is
implemented and merged.

Bug: 142654031
Test: Manual - comment only change
Change-Id: Ib733e71840e82e5cd9c47825a53f804f9c296a3d
diff --git a/automotive/can/1.0/tools/configurator/canprototools.cpp b/automotive/can/1.0/tools/configurator/canprototools.cpp
index e7e3642..0a12bd6 100644
--- a/automotive/can/1.0/tools/configurator/canprototools.cpp
+++ b/automotive/can/1.0/tools/configurator/canprototools.cpp
@@ -96,7 +96,6 @@
             if (!ifname.empty()) socketcan.ifname(ifname);
             if (!serialno.empty()) socketcan.serialno({serialno.begin(), serialno.end()});
             bus_cfg.interfaceId.socketcan(socketcan);
-            // TODO(b/142654031) - add support for serial number as an option instead of ifname.
             break;
         }
         case Bus::kSlcan: {