chore: remove unused imports

Google APIs · copybara-github · commit 942691f8dcf3 · 2022-05-23T00:56:55.000-07:00
PiperOrigin-RevId: 450372109
diff --git a/google/bigtable/admin/v2/common.proto b/google/bigtable/admin/v2/common.proto
@@ -16,7 +16,6 @@ syntax = "proto3";
 
 package google.bigtable.admin.v2;
 
-import "google/api/annotations.proto";
 import "google/protobuf/timestamp.proto";
 
 option csharp_namespace = "Google.Cloud.Bigtable.Admin.V2";
diff --git a/google/bigtable/admin/v2/instance.proto b/google/bigtable/admin/v2/instance.proto
@@ -16,7 +16,6 @@ syntax = "proto3";
 
 package google.bigtable.admin.v2;
 
-import "google/api/annotations.proto";
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
 import "google/bigtable/admin/v2/common.proto";
diff --git a/google/bigtable/admin/v2/table.proto b/google/bigtable/admin/v2/table.proto
@@ -16,7 +16,6 @@ syntax = "proto3";
 
 package google.bigtable.admin.v2;
 
-import "google/api/annotations.proto";
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
 import "google/protobuf/duration.proto";
