remove translation word

apps/app/public/static/locales/en_US/translation.json

@@ -442,7 +442,6 @@
     "page_not_found_in_preview": "\"{{path}}\" is not a GROWI page."
   },
   "toaster": {
-    "file_upload_succeeded": "File upload succeeded.",
     "file_upload_failed": "File upload failed.",
     "initialize_successed": "Succeeded to initialize {{target}}",
     "remove_share_link_success": "Succeeded to remove {{shareLinkId}}",

apps/app/public/static/locales/ja_JP/translation.json

@@ -475,7 +475,6 @@
     "page_not_found_in_preview": "\"{{path}}\" というページはありません。"
   },
   "toaster": {
-    "file_upload_succeeded": "ファイルをアップロードしました",
     "file_upload_failed": "ファイルのアップロードに失敗しました",
     "initialize_successed": "{{target}}を初期化しました",
     "remove_share_link_success": "{{shareLinkId}}を削除しました",

apps/app/public/static/locales/zh_CN/translation.json

@@ -431,7 +431,6 @@
     "page_not_found_in_preview": "\"{{path}}\" is not a GROWI page."
   },
 	"toaster": {
-    "file_upload_succeeded": "文件上传成功",
     "file_upload_failed": "文件上传失败",
     "initialize_successed": "Succeeded to initialize {{target}}",
     "switch_disable_link_sharing_success": "成功更新分享链接设置",