radicle-surf: move vcs::git to git

Other VCS systems are no longer expected to be supported.

Remove the git hierarchy up to the top-level and remove the vcs
hierarchy.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle-surf/src/commit.rs

@@ -26,10 +26,9 @@ use serde::{
 use crate::{
     diff,
     file_system,
-    git::Glob,
+    git::{self, BranchName, Glob, RepositoryRef},
     person::Person,
     revision::Revision,
-    vcs::git::{self, BranchName, RepositoryRef},
 };
 
 use radicle_git_ext::Oid;