chore(chat): revert "add config to generate apiv1 (#9480)" (#9481)

This reverts commit 2577611.

.github/.OwlBot.yaml

@@ -64,7 +64,6 @@ deep-remove-regex:
   - /binaryauthorization/apiv1beta1/
   - /certificatemanager/apiv1/
   - /channel/apiv1/
-  - /chat/apiv1/
   - /cloudbuild/apiv1/v2/
   - /cloudbuild/apiv2/
   - /clouddms/apiv1/
@@ -190,7 +189,6 @@ deep-remove-regex:
   - /internal/generated/snippets/binaryauthorization/apiv1beta1/
   - /internal/generated/snippets/certificatemanager/apiv1/
   - /internal/generated/snippets/channel/apiv1/
-  - /internal/generated/snippets/chat/apiv1/
   - /internal/generated/snippets/cloudbuild/apiv1/v2/
   - /internal/generated/snippets/cloudbuild/apiv2/
   - /internal/generated/snippets/clouddms/apiv1/
@@ -681,8 +679,6 @@ deep-copy-regex:
     dest: /
   - source: /google/cloud/channel/v1/cloud.google.com/go
     dest: /
-  - source: /google/cloud/chat/v1/cloud.google.com/go
-    dest: /
   - source: /google/devtools/cloudbuild/v1/cloud.google.com/go
     dest: /
   - source: /google/devtools/cloudbuild/v2/cloud.google.com/go

internal/postprocessor/config.yaml

@@ -26,7 +26,6 @@ modules:
   - binaryauthorization
   - certificatemanager
   - channel
-  - chat
   - cloudbuild
   - clouddms
   - cloudprofiler
@@ -451,9 +450,6 @@ service-configs:
   - input-directory: google/cloud/channel/v1
     service-config: cloudchannel_v1.yaml
     import-path: cloud.google.com/go/channel/apiv1
-  - input-directory: google/cloud/chat/v1
-    service-config: chat_v1.yaml
-    import-path: cloud.google.com/go/chat/apiv1
   - input-directory: google/cloud/clouddms/v1
     service-config: datamigration_v1.yaml
     import-path: cloud.google.com/go/clouddms/apiv1