stake: Remove v2 program references (backport #19308) (#19336)

* stake: Remove v2 program references (#19308)

* stake: Remove v2 program references

* Remove stake v2 feature, along with stake rewrite

(cherry picked from commit 73aa004c59)

# Conflicts:
#	runtime/src/bank.rs

* Fix merge conflict

* Fix uses of old `stake` function

Co-authored-by: Jon Cinque <jon.cinque@gmail.com>

cli/src/cluster_query.rs

@@ -1,7 +1,6 @@
 use crate::{
     cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult},
     spend_utils::{resolve_spend_tx_and_check_account_balance, SpendAmount},
-    stake::is_stake_program_v2_enabled,
 };
 use clap::{value_t, value_t_or_exit, App, AppSettings, Arg, ArgMatches, SubCommand};
 use console::{style, Emoji};
@@ -1750,8 +1749,6 @@ pub fn process_show_stakes(
     let stake_history = from_account(&stake_history_account).ok_or_else(|| {
         CliError::RpcRequestError("Failed to deserialize stake history".to_string())
     })?;
-    // At v1.6, this check can be removed and simply passed as `true`
-    let stake_program_v2_enabled = is_stake_program_v2_enabled(rpc_client)?;
 
     let mut stake_accounts: Vec<CliKeyedStakeState> = vec![];
     for (stake_pubkey, stake_account) in all_stake_accounts {
@@ -1767,7 +1764,6 @@ pub fn process_show_stakes(
                                 use_lamports_unit,
                                 &stake_history,
                                 &clock,
-                                stake_program_v2_enabled,
                             ),
                         });
                     }
@@ -1786,7 +1782,6 @@ pub fn process_show_stakes(
                                 use_lamports_unit,
                                 &stake_history,
                                 &clock,
-                                stake_program_v2_enabled,
                             ),
                         });
                     }