Fix program build errors

Author: joncinque

program/src/entrypoint.rs

@@ -4,7 +4,7 @@ use {
     crate::processor::Processor,
     solana_account_info::AccountInfo,
     solana_msg::msg,
-    solana_program_error::{ProgramResult, ToStr},
+    solana_program_error::ProgramResult,
     solana_pubkey::Pubkey,
     spl_token_interface::error::TokenError,
 };

program/src/processor.rs

@@ -1035,7 +1035,7 @@ fn delete_account(account_info: &AccountInfo) -> Result<(), ProgramError> {
 #[cfg(target_os = "solana")]
 fn delete_account(account_info: &AccountInfo) -> Result<(), ProgramError> {
     account_info.assign(&system_program::id());
-    account_info.realloc(0, false)
+    account_info.resize(0)
 }
 
 #[cfg(test)]