chore: remove unused Spanish (Mexico) translation files

1. Deleted dde-rollback_es_MX.ts and dde-update_es_MX.ts translation
files
2. These files were empty (all translations marked as unfinished)
3. Removing unused files reduces repository clutter and maintenance
overhead
4. No active translations were lost as these were effectively
placeholder files

chore: 移除未使用的西班牙语(墨西哥)翻译文件

1. 删除了 dde-rollback_es_MX.ts 和 dde-update_es_MX.ts 翻译文件
2. 这些文件是空的(所有翻译都标记为未完成)
3. 移除未使用的文件可以减少仓库混乱和维护开销
4. 没有丢失任何有效翻译，因为这些文件实际上是占位文件

Author: xionglinlin