chore(i18n): delete dead message namespaces for hidden pages + remove… #1440

Job	Run time
Migration Drift Check	36s
Code Quality Checks	7m 5s
Run Tests	-1s
Local E2E Journeys	7m 2s
Auth Smoke Test	1m 27s
Dual-Persona Inventory Smoke	2m 52s
	19m 1s

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