update

lang/src/accounts/header.rs

@@ -6,7 +6,7 @@ pub fn read_discriminator(data: &[u8]) -> &[u8; 8] {
 }
 
 #[cfg(not(feature = "deprecated-layout"))]
-pub fn read_discriminator<'a>(data: &[u8]) -> &[u8; 4] {
+pub fn read_discriminator(data: &[u8]) -> &[u8; 4] {
     array_ref![data, 2, 4]
 }
 

lang/src/accounts/loader.rs

@@ -1,7 +1,6 @@
 use crate::accounts::header;
 use crate::error::ErrorCode;
 use crate::*;
-use arrayref::array_ref;
 use solana_program::account_info::AccountInfo;
 use solana_program::entrypoint::ProgramResult;
 use solana_program::instruction::AccountMeta;