simplify timeoutinterceptor (#840)

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

zrpc/internal/clientinterceptors/timeoutinterceptor.go

@@ -17,27 +17,6 @@ func TimeoutInterceptor(timeout time.Duration) grpc.UnaryClientInterceptor {
 
 		ctx, cancel := context.WithTimeout(ctx, timeout)
 		defer cancel()
-
-		// create channel with buffer size 1 to avoid goroutine leak
-		done := make(chan error, 1)
-		panicChan := make(chan interface{}, 1)
-		go func() {
-			defer func() {
-				if p := recover(); p != nil {
-					panicChan <- p
-				}
-			}()
-
-			done <- invoker(ctx, method, req, reply, cc, opts...)
-		}()
-
-		select {
-		case p := <-panicChan:
-			panic(p)
-		case err := <-done:
-			return err
-		case <-ctx.Done():
-			return ctx.Err()
-		}
+		return invoker(ctx, method, req, reply, cc, opts...)
 	}
 }