update_engine: Remove references to bluetooth and wimax

Shill does not support bluetooth (kTypeBluetooth is left over from the
flimflam API) and has stopped supporting Wimax.

BUG=chromium:954635
TEST=`FEATURES="test" emerge-$BOARD update_engine update_engine-client`

Change-Id: I3e7d4f0b0a7625067585b6f9fdeec196b87f7026
Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/system/update_engine/+/1752329
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Tested-by: Alex Khouderchah <akhouderchah@chromium.org>
Commit-Queue: Alex Khouderchah <akhouderchah@chromium.org>
diff --git a/metrics_constants.h b/metrics_constants.h
index 161d585..167e577 100644
--- a/metrics_constants.h
+++ b/metrics_constants.h
@@ -119,12 +119,12 @@
   kUnknown = 0,           // Unknown.
   kEthernet = 1,          // Ethernet.
   kWifi = 2,              // Wireless.
-  kWimax = 3,             // WiMax.
-  kBluetooth = 4,         // Bluetooth.
   kCellular = 5,          // Cellular.
   kTetheredEthernet = 6,  // Tethered (Ethernet).
   kTetheredWifi = 7,      // Tethered (Wifi).
   kDisconnected = 8,      // Disconnected.
+  // deprecated: kWimax = 3,
+  // deprecated: kBluetooth = 4,
 
   kNumConstants,
   kUnset = -1