delete imported redundantly

[getong]

cargo build warning:

11 |   use crate::{include_file_descriptor_set, Code, Request, Response, Service, Status, Streaming};
   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
  ::: /Users/gerald/test/rust/poem/poem-grpc/src/macros.rs:11:1
   |
11 | / macro_rules! include_file_descriptor_set {
12 | |     ($package: tt) => {
13 | |         include_bytes!(concat!(env!("OUT_DIR"), concat!("/", $package)))
14 | |     };
15 | | }
   | |_- the item `include_file_descriptor_set` is already defined here
   |
   = note: `#[warn(unused_imports)]` on by default

[sunli829]

what Rust version are you using?

[attila-lin]

rustc 1.79.0-nightly (c9f8f3438 2024-03-27) will reproduce