chore: remove unused Spanish translation files

1. Deleted dde-session-shell_es_419.ts (Latin American Spanish)
2. Deleted dde-session-shell_es_AR.ts (Argentinian Spanish)
3. Deleted dde-session-shell_es_CL.ts (Chilean Spanish)
4. Deleted dde-session-shell_es_MX.ts (Mexican Spanish)

chore: 移除未使用的西班牙语翻译文件

1. 删除了 dde-session-shell_es_419.ts (拉丁美洲西班牙语)
2. 删除了 dde-session-shell_es_AR.ts (阿根廷西班牙语)
3. 删除了 dde-session-shell_es_CL.ts (智利西班牙语)
4. 删除了 dde-session-shell_es_MX.ts (墨西哥西班牙语)

Author: xionglinlin