Remove support for deprecated rpc endpoints (#1809)

* Remove rpc_obsolete_v1_7

* Remove rpc_deprecated_v1_7

* Remove rpc_deprecated_v1_9

* Add CHANGELOG entry

* Add another CHANGELOG entry

CHANGELOG.md

@@ -14,14 +14,19 @@ Release channels have their own copy of this changelog:
 
 <a name="edge-channel"></a>
 ## [2.1.0] - Unreleased
-
 * Changes
   * SDK: removed the `respan` macro. This was marked as "internal use only" and was no longer used internally.
 
 ## [2.0.0]
 * Breaking
   * SDK: Support for Borsh v0.9 removed, please use v1 or v0.10 (#1440)
   * SDK: `Copy` is no longer derived on `Rent` and `EpochSchedule`, please switch to using `clone()` (solana-labs#32767)
+  * RPC: obsolete and deprecated v1 endpoints are removed. These endpoints are:
+    confirmTransaction, getSignatureStatus, getSignatureConfirmation, getTotalSupply,
+    getConfirmedSignaturesForAddress, getConfirmedBlock, getConfirmedBlocks, getConfirmedBlocksWithLimit,
+    getConfirmedTransaction, getConfirmedSignaturesForAddress2, getRecentBlockhash, getFees,
+    getFeeCalculatorForBlockhash, getFeeRateGovernor, getSnapshotSlot
+  * `--enable-rpc-obsolete_v1_7` flag removed
 * Changes
   * `central-scheduler` as default option for `--block-production-method` (#34891)
   * `solana-rpc-client-api`: `RpcFilterError` depends on `base64` version 0.22, so users may need to upgrade to `base64` version 0.22

rpc-test/tests/rpc.rs

@@ -77,7 +77,7 @@ fn test_rpc_send_tx() {
 
     let bob_pubkey = solana_sdk::pubkey::new_rand();
 
-    let req = json_req!("getRecentBlockhash", json!([]));
+    let req = json_req!("getLatestBlockhash", json!([]));
     let json = post_rpc(req, &rpc_url);
 
     let blockhash: Hash = json["result"]["value"]["blockhash"]