Remove deprecated feature in 0.4.1 (before 0.5.0)

[leoguillaume]

Remove following items :

• collection argument of POST /v1/documents endpoint is deprecated, replaced by collection_id, removed in v0.5.0. (feat(chunks): add POST /v1/chunks endpoint #660)
• GET /v1/chunks/{document}/{chunk} endpoint is deprecated, replaced by GET /v1/documents/{document_id}/chunks/{chunk_id}, removed in v0.5.0. (feat(chunks): add POST /v1/chunks endpoint #660)
• GET /v1/chunks endpoint is deprecated, replaced by GET /v1/documents/{document_id}/chunks, removed in v0.5.0. (feat(chunks): add POST /v1/chunks endpoint #660)
• POST /v1/parse-beta endpoint is deprecated, removed in v0.5.0. (feat(documents): deprecated legacy endpoint /v1/files and /v1/ocr-beta #698)
• collections argument in POST /v1/search endpoint is deprecated, replaced by collection_ids, removed in v0.5.0. (feat(search): add metadata filter in search endpoint #700)
• search argument in POST /v1/chat/completions endpoint is deprecated, replaced by build-in search tool in tools argument, removed in v0.5.0. (feat(chat): add search into a build-in tool #708)
• prompt argument in POST /v1/search endpoint is deprecated, replaced by query argument, removed in v0.5.0. (feat(chat): add search into a build-in tool #708)