[wlan] Remove incorrect channel band values

Previously, we incorrectly specified channel bandwidth values for
channel band dimensions. We have added the correct values and updated
the code to log them. This commit removes the old incorrect values.

COBALT_BACKWARDS_INCOMPATIBLE_CHANGE_DATA_CORRUPTION_POSSIBLE=1

Bug: 36861
Change-Id: Ie9f62b3af4fb23096316eee6b8c53ceb632f8e94
diff --git a/fuchsia/connectivity_wlan/metrics.yaml b/fuchsia/connectivity_wlan/metrics.yaml
index e022368..7752690 100644
--- a/fuchsia/connectivity_wlan/metrics.yaml
+++ b/fuchsia/connectivity_wlan/metrics.yaml
@@ -483,12 +483,6 @@
         9: Wpa3Enterprise
     - dimension: channel_band
       event_codes: &channel_bands
-        0: Cbw20
-        1: Cbw40
-        2: Cbw40Below
-        3: Cbw80
-        4: Cbw160
-        5: Cbw80P80
         6: Band2Dot4Ghz
         7: Band5Ghz
   reports: