FIX update git commit api for gitea platform

app/controllers/repositories_controller.rb

@@ -49,7 +49,6 @@ class RepositoriesController < ApplicationController
 
   def commit
     @commit = Gitea::Repository::Commits::GetService.new(@repo.user.login, @repo.identifier, params[:sha], current_user.gitea_token).call
-    @custom_commit = Gitea::Repository::Commits::GetService.new(@repo.user.login, @repo.identifier, params[:sha], current_user.gitea_token, true).call
   end
 
   def tags

app/views/repositories/commit.json.jbuilder

@@ -1,6 +1,6 @@
 json.key_format! camelize: :lower
-json.additions @custom_commit['TotalAddition']
-json.deletions @custom_commit['TotalDeletion']
+json.additions @commit['commit_diff']['TotalAddition']
+json.deletions @commit['commit_diff']['TotalDeletion']
 json.sha @commit['sha']
 json.url request.url
 json.commit do
@@ -23,4 +23,4 @@ json.parents @commit['parents'] do |parent|
   json.url EduSetting.get('host_name') + commit_repository_path(@repo, parent['sha'])
 end
 
-json.files @custom_commit['Files']
+json.files @commit['commit_diff']['Files']