No need to specify Cargo.toml in package.include

Cargo.toml is always included in the published crate.

Author: dtolnay

Cargo.toml

@@ -9,7 +9,7 @@ documentation = "https://docs.serde.rs/serde_json/"
 keywords = ["json", "serde", "serialization"]
 categories = ["encoding"]
 readme = "README.md"
-include = ["Cargo.toml", "src/**/*.rs", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+include = ["src/**/*.rs", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
 edition = "2018"
 
 [dependencies]