simplify timeoutinterceptor (#840)

Co-authored-by: chenmusheng <chenmusheng@laoyuegou.com>

zrpc/internal/clientinterceptors/timeoutinterceptor_test.go

@@ -49,25 +49,6 @@ func TestTimeoutInterceptor_timeout(t *testing.T) {
 	assert.Nil(t, err)
 }
 
-func TestTimeoutInterceptor_timeoutExpire(t *testing.T) {
-	const timeout = time.Millisecond * 10
-	interceptor := TimeoutInterceptor(timeout)
-	ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
-	defer cancel()
-	var wg sync.WaitGroup
-	wg.Add(1)
-	cc := new(grpc.ClientConn)
-	err := interceptor(ctx, "/foo", nil, nil, cc,
-		func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn,
-			opts ...grpc.CallOption) error {
-			defer wg.Done()
-			time.Sleep(time.Millisecond * 50)
-			return nil
-		})
-	wg.Wait()
-	assert.Equal(t, context.DeadlineExceeded, err)
-}
-
 func TestTimeoutInterceptor_panic(t *testing.T) {
 	timeouts := []time.Duration{0, time.Millisecond * 10}
 	for _, timeout := range timeouts {