repository: Simplify worker group code

internal/checker/checker.go

@@ -142,7 +142,7 @@ func (c *Checker) LoadIndex(ctx context.Context) (hints []error, errs []error) {
 
 	// run workers on ch
 	wg.Go(func() error {
-		return repository.RunWorkers(ctx, defaultParallelism, worker, final)
+		return repository.RunWorkers(defaultParallelism, worker, final)
 	})
 
 	// receive decoded indexes

internal/repository/repository.go

@@ -479,7 +479,7 @@ func (r *Repository) LoadIndex(ctx context.Context) error {
 
 	// run workers on ch
 	wg.Go(func() error {
-		return RunWorkers(ctx, loadIndexParallelism, worker, final)
+		return RunWorkers(loadIndexParallelism, worker, final)
 	})
 
 	// receive decoded indexes

internal/repository/worker_group.go

@@ -1,8 +1,6 @@
 package repository
 
 import (
-	"context"
-
 	"golang.org/x/sync/errgroup"
 )
 
@@ -10,8 +8,8 @@ import (
 // After all workers have terminated, finalFunc is run. If an error occurs in
 // one of the workers, it is returned. FinalFunc is always run, regardless of
 // any other previous errors.
-func RunWorkers(ctx context.Context, count int, workerFunc func() error, finalFunc func()) error {
+func RunWorkers(count int, workerFunc func() error, finalFunc func()) error {
-	wg, _ := errgroup.WithContext(ctx)
+	var wg errgroup.Group
 
 	// run workers
 	for i := 0; i < count; i++ {