ref: Drop unused and deprecated ListNewCommits RPC

The ListNewCommits RPC used to list all commits which were returned by
`git rev-list $newrev --not --all`, that is all commits which aren't
referenced by any existing ref. This RPC was replaced by ListCommits,
which is a lot more flexible and allows passing an arbitrary number of
revisions, including pseudo-refs "--not" and "--all". Downstream has
been converted in e8a98485fe7 (ff: Remove `:list_commits` feature flag,
2021-07-23) to exclusively use ListCommits, so ListNewCommits is now
unused.

Remove ListNewCommits.

Changelog: removed

1 files changed, 0 insertions, 16 deletions

diff --git a/proto/ref.proto b/proto/ref.proto
index ddedac199..e228d2319 100644
--- a/proto/ref.proto
+++ b/proto/ref.proto
@@ -98,13 +98,6 @@ service RefService {
     };
   }
 
-  // Returns commits that are only reachable from the ref passed
-  rpc ListNewCommits(ListNewCommitsRequest) returns (stream ListNewCommitsResponse) {
-    option (op_type) = {
-      op: ACCESSOR
-    };
-  }
-
   rpc PackRefs(PackRefsRequest) returns (PackRefsResponse) {
     option (op_type) = {
       op: MUTATOR
@@ -376,15 +369,6 @@ message GetTagMessagesResponse {
   string tag_id = 3;
 }
 
-message ListNewCommitsRequest {
-  Repository repository = 1 [(target_repository)=true];
-  string commit_id = 2;
-}
-
-message ListNewCommitsResponse {
-  repeated GitCommit commits = 1;
-}
-
 message FindAllRemoteBranchesRequest {
   Repository repository = 1 [(target_repository)=true];
   string remote_name = 2;