chore: remove unused i18n strings

- no longer valid after delete confirmation dialog is using the new api

Author: fioan89

src/main/resources/localization/defaultMessages.po

@@ -28,24 +28,9 @@ msgstr ""
 msgid "Save"
 msgstr ""
 
-msgid "Delete"
-msgstr ""
-
 msgid "Cancel"
 msgstr ""
 
-msgid "Delete running workspace?"
-msgstr ""
-
-msgid "Delete workspace?"
-msgstr ""
-
-msgid "Workspace will be closed and all the information in this workspace will be lost, including all files, unsaved changes and historical."
-msgstr ""
-
-msgid "All the information in this workspace will be lost, including all files, unsaved changes and historical."
-msgstr ""
-
 msgid "Session Token"
 msgstr ""