chore: drop no longer existed translation resource

删除不再存在的翻译资源

Log:

Author: BLumia

.tx/transifex.yaml

@@ -29,10 +29,5 @@ filters:
     file_format: QT
     source_language: en_US
     translation_files_expression: panels/notification/osd/displaymode/translations/org.deepin.ds.osd.displaymode_<lang>.ts
-  - filter_type: file
-    source_file: panels/dock/dcc-dock-plugin/translations/dock.ts
-    file_format: QT
-    source_language: en_US
-    translation_files_expression: panels/dock/dcc-dock-plugin/translations/dock_<lang>.ts
 settings:
   pr_branch_name: transifex_update_<br_unique_id>