Remove unused Ruby implementation for CommitStats

Commit stats are new served by Go, and the implementation can be removed
from the Ruby sidecar.

MR of the Go port: https://gitlab.com/gitlab-org/gitaly/merge_requests/1048
Closes https://gitlab.com/gitlab-org/gitaly/issues/1471

4 files changed, 0 insertions, 78 deletions

diff --git a/ruby/lib/gitaly_server/commit_service.rb b/ruby/lib/gitaly_server/commit_service.rb
index e4916ec70..1aed50b3e 100644
--- a/ruby/lib/gitaly_server/commit_service.rb
+++ b/ruby/lib/gitaly_server/commit_service.rb
@@ -3,24 +3,6 @@ module GitalyServer
     include Utils
     include Gitlab::EncodingHelper
 
-    # TODO remove in gitlab 12.0, this is implemented in Go now:
-    # https://gitlab.com/gitlab-org/gitaly/issues/1471
-    def commit_stats(request, call)
-      repo = Gitlab::Git::Repository.from_gitaly(request.repository, call)
-      revision = request.revision unless request.revision.empty?
-
-      commit = Gitlab::Git::Commit.find(repo, revision)
-
-      # In the odd case that the revision given doesn't exist we need to raise
-      # an exception. Since GitLab (currently) already does this for us we don't
-      # expect this to actually happen, just guarding against future code change
-      raise GRPC::Internal.new("commit not found for revision '#{revision}'") unless commit
-
-      stats = Gitlab::Git::CommitStats.new(repo, commit)
-
-      Gitaly::CommitStatsResponse.new(oid: stats.id, additions: stats.additions, deletions: stats.deletions)
-    end
-
     def find_commits(request, call)
       repository = Gitlab::Git::Repository.from_gitaly(request.repository, call)
       options = {
diff --git a/ruby/lib/gitlab/git/commit.rb b/ruby/lib/gitlab/git/commit.rb
index c163e9e6e..9a420c04b 100644
--- a/ruby/lib/gitlab/git/commit.rb
+++ b/ruby/lib/gitlab/git/commit.rb
@@ -133,12 +133,6 @@ module Gitlab
         diff
       end
 
-      def has_zero_stats?
-        stats.total.zero?
-      rescue
-        true
-      end
-
       def no_commit_message
         "--no commit message"
       end
@@ -157,10 +151,6 @@ module Gitlab
         parent_ids.map { |oid| self.class.find(@repository, oid) }.compact
       end
 
-      def stats
-        Gitlab::Git::CommitStats.new(@repository, self)
-      end
-
       def message
         encode! @message
       end
diff --git a/ruby/lib/gitlab/git/commit_stats.rb b/ruby/lib/gitlab/git/commit_stats.rb
deleted file mode 100644
index 1959233e1..000000000
--- a/ruby/lib/gitlab/git/commit_stats.rb
+++ /dev/null
@@ -1,27 +0,0 @@
-# Gitlab::Git::CommitStats counts the additions, deletions, and total changes
-# in a commit.
-module Gitlab
-  module Git
-    class CommitStats
-      attr_reader :id, :additions, :deletions, :total
-
-      # Instantiate a CommitStats object
-      #
-      # Gitaly migration: https://gitlab.com/gitlab-org/gitaly/issues/323
-      def initialize(_repo, commit)
-        @id = commit.id
-        @additions = 0
-        @deletions = 0
-        @total = 0
-
-        rugged_stats(commit)
-      end
-
-      def rugged_stats(commit)
-        diff = commit.rugged_diff_from_parent
-        _files_changed, @additions, @deletions = diff.stat
-        @total = @additions + @deletions
-      end
-    end
-  end
-end
diff --git a/ruby/spec/lib/gitlab/git/commit_spec.rb b/ruby/spec/lib/gitlab/git/commit_spec.rb
index b46346353..217e226b9 100644
--- a/ruby/spec/lib/gitlab/git/commit_spec.rb
+++ b/ruby/spec/lib/gitlab/git/commit_spec.rb
@@ -168,29 +168,6 @@ describe Gitlab::Git::Commit do
     end
   end
 
-  describe '#stats' do
-    subject { commit.stats }
-
-    describe '#additions' do
-      subject { super().additions }
-      it { is_expected.to eq(11) }
-    end
-
-    describe '#deletions' do
-      subject { super().deletions }
-      it { is_expected.to eq(6) }
-    end
-
-    describe '#total' do
-      subject { super().total }
-      it { is_expected.to eq(17) }
-    end
-  end
-
-  describe '#has_zero_stats?' do
-    it { expect(commit.has_zero_stats?).to eq(false) }
-  end
-
   describe '#to_hash' do
     let(:hash) { commit.to_hash }
     subject { hash }