[chore] Remove redundant wait group from a test

exporter/exporterhelper/batch_sender_test.go

@@ -458,16 +458,12 @@ func TestBatchSender_ShutdownDeadlock(t *testing.T) {
 
 	sink := newFakeRequestSink()
 
-	// Send 10 concurrent requests and wait for them to start
-	startWG := sync.WaitGroup{}
+	// Send 10 concurrent requests
 	for i := 0; i < 10; i++ {
-		startWG.Add(1)
 		go func() {
-			startWG.Done()
 			require.NoError(t, be.send(context.Background(), &fakeRequest{items: 4, sink: sink}))
 		}()
 	}
-	startWG.Wait()
 
 	// Wait for at least one batch to enter the merge function
 	<-waitMerge