radicle-git-ext: remove link-git dependency

link-git is still at an early stage and it's not certain what we will
want to keep out of it, thus publishing it should be avoided.

Remove `link-git` from `radicle-git-ext` for the time being.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>

radicle-git-ext/Cargo.toml

@@ -23,10 +23,6 @@ features = ["vendored-libgit2"]
 [dependencies.git-ref-format]
 path = "../git-ref-format"
 
-[dependencies.link-git]
-path = "../link-git"
-optional = true
-
 [dependencies.minicbor]
 version = "0.13"
 features = ["std"]

radicle-git-ext/src/oid.rs

@@ -13,9 +13,6 @@ use std::{
 use multihash::{Multihash, MultihashRef};
 use thiserror::Error;
 
-#[cfg(feature = "link-git")]
-use link_git::hash as git_hash;
-
 /// Serializable [`git2::Oid`]
 #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Oid(git2::Oid);
@@ -116,14 +113,6 @@ impl AsRef<[u8]> for Oid {
     }
 }
 
-#[cfg(feature = "link-git")]
-impl AsRef<git_hash::oid> for Oid {
-    fn as_ref(&self) -> &git_hash::oid {
-        // SAFETY: checks the length of the slice, which we know is correct
-        git_hash::oid::try_from(self.as_bytes()).unwrap()
-    }
-}
-
 impl From<git2::Oid> for Oid {
     fn from(oid: git2::Oid) -> Self {
         Self(oid)
@@ -136,28 +125,6 @@ impl From<Oid> for git2::Oid {
     }
 }
 
-#[cfg(feature = "link-git")]
-impl From<git_hash::ObjectId> for Oid {
-    fn from(git_hash::ObjectId::Sha1(bs): git_hash::ObjectId) -> Self {
-        // SAFETY: checks the length of the slice, which we statically know
-        Self(git2::Oid::from_bytes(&bs).unwrap())
-    }
-}
-
-#[cfg(feature = "link-git")]
-impl From<Oid> for git_hash::ObjectId {
-    fn from(oid: Oid) -> Self {
-        Self::from_20_bytes(oid.as_ref())
-    }
-}
-
-#[cfg(feature = "link-git")]
-impl<'a> From<&'a Oid> for &'a git_hash::oid {
-    fn from(oid: &'a Oid) -> Self {
-        oid.as_ref()
-    }
-}
-
 impl Display for Oid {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         self.0.fmt(f)