diff --git a/google/cloud/bigquery/datatransfer/v1/transfer.proto b/google/cloud/bigquery/datatransfer/v1/transfer.proto
index 1928e06570..9092b4b9e5 100644
--- a/google/cloud/bigquery/datatransfer/v1/transfer.proto
+++ b/google/cloud/bigquery/datatransfer/v1/transfer.proto
@@ -18,7 +18,6 @@ package google.cloud.bigquery.datatransfer.v1;
 
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
-import "google/protobuf/duration.proto";
 import "google/protobuf/struct.proto";
 import "google/protobuf/timestamp.proto";
 import "google/rpc/status.proto";
diff --git a/google/cloud/bigquery/v2/encryption_config.proto b/google/cloud/bigquery/v2/encryption_config.proto
index f241eb5f91..d5d61f2c40 100644
--- a/google/cloud/bigquery/v2/encryption_config.proto
+++ b/google/cloud/bigquery/v2/encryption_config.proto
@@ -18,7 +18,6 @@ package google.cloud.bigquery.v2;
 
 import "google/api/field_behavior.proto";
 import "google/protobuf/wrappers.proto";
-import "google/api/annotations.proto";
 
 option go_package = "google.golang.org/genproto/googleapis/cloud/bigquery/v2;bigquery";
 option java_outer_classname = "EncryptionConfigProto";
diff --git a/google/cloud/bigquery/v2/model_reference.proto b/google/cloud/bigquery/v2/model_reference.proto
index d0b6039d3a..6a447e95d8 100644
--- a/google/cloud/bigquery/v2/model_reference.proto
+++ b/google/cloud/bigquery/v2/model_reference.proto
@@ -17,7 +17,6 @@ syntax = "proto3";
 package google.cloud.bigquery.v2;
 
 import "google/api/field_behavior.proto";
-import "google/api/annotations.proto";
 
 option go_package = "google.golang.org/genproto/googleapis/cloud/bigquery/v2;bigquery";
 option java_outer_classname = "ModelReferenceProto";
diff --git a/google/cloud/bigquery/v2/standard_sql.proto b/google/cloud/bigquery/v2/standard_sql.proto
index 321290c716..f3cf2addd6 100644
--- a/google/cloud/bigquery/v2/standard_sql.proto
+++ b/google/cloud/bigquery/v2/standard_sql.proto
@@ -17,7 +17,6 @@ syntax = "proto3";
 package google.cloud.bigquery.v2;
 
 import "google/api/field_behavior.proto";
-import "google/api/annotations.proto";
 
 option go_package = "google.golang.org/genproto/googleapis/cloud/bigquery/v2;bigquery";
 option java_outer_classname = "StandardSqlProto";
diff --git a/google/cloud/bigquery/v2/table_reference.proto b/google/cloud/bigquery/v2/table_reference.proto
index ae99460e93..0ccd7d4f71 100644
--- a/google/cloud/bigquery/v2/table_reference.proto
+++ b/google/cloud/bigquery/v2/table_reference.proto
@@ -17,7 +17,6 @@ syntax = "proto3";
 package google.cloud.bigquery.v2;
 
 import "google/api/field_behavior.proto";
-import "google/api/annotations.proto";
 
 option go_package = "google.golang.org/genproto/googleapis/cloud/bigquery/v2;bigquery";
 option java_outer_classname = "TableReferenceProto";