minifest: Remove homepage

`homepage` is meaningless if it just points to the repo.

And from the docs:

A value should only be set for homepage if there is a dedicated
website for the crate other than the source repository or API
documentation. Do not make homepage redundant with either the
documentation or repository values.

Author: tcharding

Cargo.toml

@@ -4,7 +4,6 @@ version = "0.31.1"
 authors = [ "Dawid Ciężarkiewicz <[email protected]>",
             "Andrew Poelstra <[email protected]>" ]
 license = "CC0-1.0"
-homepage = "https://github.com/rust-bitcoin/rust-secp256k1/"
 repository = "https://github.com/rust-bitcoin/rust-secp256k1/"
 documentation = "https://docs.rs/secp256k1/"
 description = "Rust wrapper library for Pieter Wuille's `libsecp256k1`. Implements ECDSA and BIP 340 signatures for the SECG elliptic curve group secp256k1 and related utilities."