chore: Update discovery artifacts (#1306)

## Deleted keys were detected in the following pre-stable discovery artifacts:
bigqueryreservationv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/6a8b3c6bd7aef8c84d5ba64410b29cabf056102b)

## Discovery Artifact Change Summary:
adexchangebuyer2v2beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/949754477e811a0b490a35e7e7313bbd22918d8a)
artifactregistryv1beta2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/3811667db343c8e4ca5479b668a14b4bceddd981)
bigquerydatatransferv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/f0071f5468eaa0320920fbee1489dbc2cb5e195f)
bigqueryreservationv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/6a8b3c6bd7aef8c84d5ba64410b29cabf056102b)
bigqueryreservationv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/6a8b3c6bd7aef8c84d5ba64410b29cabf056102b)
bigtableadminv2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/d1ce2408cf8bf7deaab38f7ecff96e9cb5d5a02d)
containerv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/60a23f0cafcca5473a829e8b11280733f76a8271)
displayvideov1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/559fa7cf4c7d300947bb556eb8c2830a751c7b11)
loggingv2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a3c1055968a4d9ac2448b0540bf4e2005be2958f)
serviceusagev1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/e2a86e92aa0ab7cce0b936a764ea5440b35a62e9)
serviceusagev1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/e2a86e92aa0ab7cce0b936a764ea5440b35a62e9)
diff --git a/docs/dyn/displayvideo_v1.advertisers.channels.html b/docs/dyn/displayvideo_v1.advertisers.channels.html
index ef5af20..d4aaf76 100644
--- a/docs/dyn/displayvideo_v1.advertisers.channels.html
+++ b/docs/dyn/displayvideo_v1.advertisers.channels.html
@@ -117,7 +117,9 @@
   "channelId": "A String", # Output only. The unique ID of the channel. Assigned by the system.
   "displayName": "A String", # Required. The display name of the channel. Must be UTF-8 encoded with a maximum length of 240 bytes.
   "name": "A String", # Output only. The resource name of the channel.
+  "negativelyTargetedLineItemCount": "A String", # Output only. Number of line items that are directly targeting this channel negatively.
   "partnerId": "A String", # The ID of the partner that owns the channel.
+  "positivelyTargetedLineItemCount": "A String", # Output only. Number of line items that are directly targeting this channel positively.
 }
 
   partnerId: string, The ID of the partner that owns the created channel.
@@ -134,7 +136,9 @@
   "channelId": "A String", # Output only. The unique ID of the channel. Assigned by the system.
   "displayName": "A String", # Required. The display name of the channel. Must be UTF-8 encoded with a maximum length of 240 bytes.
   "name": "A String", # Output only. The resource name of the channel.
+  "negativelyTargetedLineItemCount": "A String", # Output only. Number of line items that are directly targeting this channel negatively.
   "partnerId": "A String", # The ID of the partner that owns the channel.
+  "positivelyTargetedLineItemCount": "A String", # Output only. Number of line items that are directly targeting this channel positively.
 }</pre>
 </div>
 
@@ -159,7 +163,9 @@
   &quot;channelId&quot;: &quot;A String&quot;, # Output only. The unique ID of the channel. Assigned by the system.
   &quot;displayName&quot;: &quot;A String&quot;, # Required. The display name of the channel. Must be UTF-8 encoded with a maximum length of 240 bytes.
   &quot;name&quot;: &quot;A String&quot;, # Output only. The resource name of the channel.
+  &quot;negativelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel negatively.
   &quot;partnerId&quot;: &quot;A String&quot;, # The ID of the partner that owns the channel.
+  &quot;positivelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel positively.
 }</pre>
 </div>
 
@@ -189,7 +195,9 @@
       &quot;channelId&quot;: &quot;A String&quot;, # Output only. The unique ID of the channel. Assigned by the system.
       &quot;displayName&quot;: &quot;A String&quot;, # Required. The display name of the channel. Must be UTF-8 encoded with a maximum length of 240 bytes.
       &quot;name&quot;: &quot;A String&quot;, # Output only. The resource name of the channel.
+      &quot;negativelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel negatively.
       &quot;partnerId&quot;: &quot;A String&quot;, # The ID of the partner that owns the channel.
+      &quot;positivelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel positively.
     },
   ],
   &quot;nextPageToken&quot;: &quot;A String&quot;, # A token to retrieve the next page of results. Pass this value in the page_token field in the subsequent call to `ListChannels` method to retrieve the next page of results.
@@ -225,7 +233,9 @@
   &quot;channelId&quot;: &quot;A String&quot;, # Output only. The unique ID of the channel. Assigned by the system.
   &quot;displayName&quot;: &quot;A String&quot;, # Required. The display name of the channel. Must be UTF-8 encoded with a maximum length of 240 bytes.
   &quot;name&quot;: &quot;A String&quot;, # Output only. The resource name of the channel.
+  &quot;negativelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel negatively.
   &quot;partnerId&quot;: &quot;A String&quot;, # The ID of the partner that owns the channel.
+  &quot;positivelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel positively.
 }
 
   partnerId: string, The ID of the partner that owns the created channel.
@@ -243,7 +253,9 @@
   &quot;channelId&quot;: &quot;A String&quot;, # Output only. The unique ID of the channel. Assigned by the system.
   &quot;displayName&quot;: &quot;A String&quot;, # Required. The display name of the channel. Must be UTF-8 encoded with a maximum length of 240 bytes.
   &quot;name&quot;: &quot;A String&quot;, # Output only. The resource name of the channel.
+  &quot;negativelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel negatively.
   &quot;partnerId&quot;: &quot;A String&quot;, # The ID of the partner that owns the channel.
+  &quot;positivelyTargetedLineItemCount&quot;: &quot;A String&quot;, # Output only. Number of line items that are directly targeting this channel positively.
 }</pre>
 </div>