remove openbook endpoints

[garrett-partenza-us]

This pull request removes the following endpoints from the SDK within the /provider, /example, and /benchmarking directories. Do not merge this until coordinated with team on also removing the endpoints from the actual Trader API.

1. GetMarketsV2
2. GetTickersV2
3. GetOrderbookV2
4. GetMarketDepthV2
5. PostOrderV2
6. PostCancelOrderV2
7. PostZetaCrossMarginAccount
8. PostSettleV2
9. GetOpenOrdersV2
10. GetUnsettledV2
11. GetMarkets
12. GetTickers
13. GetKline
14. GetOrderbook
15. GetMarketDepth
16. GetTrades
17. PostOrder
18. PostCancelOrder
19. PostCancelByClientOrderID
20. PostCancelAll
21. PostReplaceByClientOrderID
22. PostReplaceOrder
23. PostSettle
24. PostTradeSwap
25. GetOrders
26. GetOpenOrders
27. GetOrderByID
28. GetUnsettled
29. PostRouteTradeSwap
30. GetOrderbooksStream
31. GetMarketDepthsStream
32. GetTickersStream
33. GetZetaTransactionStream
34. GetTradesStream
35. GetOrderStatusStream
36. GetAccountBalances
37. GetAccountBalancesV2
38. PostOrderV2WithPriorityFee
39. PostReplaceOrderV2
40. GetQuotes
41. GetPrice