Delete unused serde_derive #[macro_use] #2532
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In old versions of rustc (1.15 through 1.29) it would cause a warning if
this #[macro_use] was not present.
warning: proc macro crates and `#[no_link]` crates have no effect without `#[macro_use]`
--> serde/src/lib.rs:340:1
|
340 | extern crate serde_derive;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
These days serde_derive requires a newer compiler than that, so the
bogus warning would never occur.
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In old versions of rustc (1.15 through 1.29) it would cause a warning if this #[macro_use] was not present.
These days serde_derive requires a newer compiler than that, so the bogus warning would never occur.