Cleanup BQ uploader un-used fields

Found two fields in BQSpec struct which are not in used. This CL clean them up.

Test: Manually upload a RPL log to bigquery table, see: b/361604740#2
Bug: b/338439004
Change-Id: I68f2490d7d4368be32b9c43bd6c56f0aeafcb45a
GitOrigin-RevId: 2baa6efe09abcc4c574341420362b57b6293e89c

cmd/bigquery/main.go

@@ -25,8 +25,8 @@ Example invocation (assuming the bigquery table already exists):
 	bazelisk run //cmd/bigquery:bigquery -- \
 	  --log_path text:///tmp/reproxy_log.rpl \
 	  --alsologtostderr=true \
-	  --table <bigquery-dataset-id>.<bigquery-table-id> \
-	  --project_id <gcp-project-id> # (ex:"foundry-x-experiments")
+	  --bq_project <gcp-project-id> # (ex:"foundry-x-experiments") \
+	  --bq_table <bigquery-dataset-id>.<bigquery-table-id>
 
 If you don't have a bigquery table yet, you can create it using the following steps:
 
@@ -87,8 +87,6 @@ func main() {
 		log.Exitf("Failed creating bigquery client: %v", err)
 	}
 	bqSpec := &bigquery.BQSpec{
-		ProjectID:   *bqProjectID,
-		TableSpec:   *bqTableSpec,
 		BatchSizeMB: *bqBatchMB,
 		Client:      client,
 		CleanUp:     cleanUp,

cmd/reproxy/main.go

@@ -496,8 +496,6 @@ func initializeLogger(mi *ignoremismatch.MismatchIgnorer, e *monitoring.Exporter
 			log.Errorf("Failed creating bigquery stream: %v", err)
 		} else {
 			bqSpec = &bigquery.BQSpec{
-				ProjectID:   *bqProjectID,
-				TableSpec:   *bqTableSpec,
 				BatchSizeMB: *bqBatchMB,
 				Client:      client,
 				CleanUp:     cleanUp,

internal/pkg/bigquery/bigquery.go

@@ -83,8 +83,6 @@ func NewInserter(ctx context.Context, resourceSpec, defaultProject string, ts *o
 // BQSpec defines which bigquery table the LogRecords will be saved.
 type BQSpec struct {
 	Err            atomic.Pointer[error]
-	ProjectID      string
-	TableSpec      string
 	BatchSizeMB    int
 	Client         *bigquery.Inserter
 	CleanUp        func() error