Remove `:id/merge_requests/:merge_request_iid/comments` endpoints

Comments for a merge request should be obtained to the `notes` endpoint.

lib/api/merge_requests.rb

@@ -226,41 +226,6 @@ module API
           .cancel(merge_request)
       end
 
-      desc 'Get the comments of a merge request' do
-        success Entities::MRNote
-      end
-      params do
-        use :pagination
-      end
-      get ':id/merge_requests/:merge_request_iid/comments' do
-        merge_request = find_merge_request_with_access(params[:merge_request_iid])
-        present paginate(merge_request.notes.fresh), with: Entities::MRNote
-      end
-
-      desc 'Post a comment to a merge request' do
-        success Entities::MRNote
-      end
-      params do
-        requires :note, type: String, desc: 'The text of the comment'
-      end
-      post ':id/merge_requests/:merge_request_iid/comments' do
-        merge_request = find_merge_request_with_access(params[:merge_request_iid], :create_note)
-
-        opts = {
-          note: params[:note],
-          noteable_type: 'MergeRequest',
-          noteable_id: merge_request.id
-        }
-
-        note = ::Notes::CreateService.new(user_project, current_user, opts).execute
-
-        if note.save
-          present note, with: Entities::MRNote
-        else
-          render_api_error!("Failed to save note #{note.errors.messages}", 400)
-        end
-      end
-
       desc 'List issues that will be closed on merge' do
         success Entities::MRNote
       end

spec/requests/api/merge_requests_spec.rb

@@ -623,64 +623,6 @@ describe API::MergeRequests, api: true  do
     end
   end
 
-  describe "POST /projects/:id/merge_requests/:merge_request_iid/comments" do
-    it "returns comment" do
-      original_count = merge_request.notes.size
-
-      post api("/projects/#{project.id}/merge_requests/#{merge_request.iid}/comments", user), note: "My comment"
-
-      expect(response).to have_http_status(201)
-      expect(json_response['note']).to eq('My comment')
-      expect(json_response['author']['name']).to eq(user.name)
-      expect(json_response['author']['username']).to eq(user.username)
-      expect(merge_request.reload.notes.size).to eq(original_count + 1)
-    end
-
-    it "returns 400 if note is missing" do
-      post api("/projects/#{project.id}/merge_requests/#{merge_request.iid}/comments", user)
-      expect(response).to have_http_status(400)
-    end
-
-    it "returns 404 if merge request iid is invalid" do
-      post api("/projects/#{project.id}/merge_requests/404/comments", user),
-        note: 'My comment'
-      expect(response).to have_http_status(404)
-    end
-
-    it "returns 404 if merge request id is used instead of iid" do
-      post api("/projects/#{project.id}/merge_requests/#{merge_request.id}/comments", user),
-        note: 'My comment'
-      expect(response).to have_http_status(404)
-    end
-  end
-
-  describe "GET :id/merge_requests/:merge_request_iid/comments" do
-    let!(:note)  { create(:note_on_merge_request, author: user, project: project, noteable: merge_request, note: "a comment on a MR") }
-    let!(:note2) { create(:note_on_merge_request, author: user, project: project, noteable: merge_request, note: "another comment on a MR") }
-
-    it "returns merge_request comments ordered by created_at" do
-      get api("/projects/#{project.id}/merge_requests/#{merge_request.iid}/comments", user)
-
-      expect(response).to have_http_status(200)
-      expect(response).to include_pagination_headers
-      expect(json_response).to be_an Array
-      expect(json_response.length).to eq(2)
-      expect(json_response.first['note']).to eq("a comment on a MR")
-      expect(json_response.first['author']['id']).to eq(user.id)
-      expect(json_response.last['note']).to eq("another comment on a MR")
-    end
-
-    it "returns a 404 error if merge_request_iid is invalid" do
-      get api("/projects/#{project.id}/merge_requests/999/comments", user)
-      expect(response).to have_http_status(404)
-    end
-
-    it "returns a 404 error if merge_request id is used instead of iid" do
-      get api("/projects/#{project.id}/merge_requests/#{merge_request.id}/comments", user)
-      expect(response).to have_http_status(404)
-    end
-  end
-
   describe 'GET :id/merge_requests/:merge_request_iid/closes_issues' do
     it 'returns the issue that will be closed on merge' do
       issue = create(:issue, project: project)