remove some boilerplate (#4143)

programs/exchange_api/src/lib.rs

@@ -5,17 +5,9 @@ pub mod exchange_state;
 #[macro_use]
 extern crate solana_metrics;
 
-use solana_sdk::pubkey::Pubkey;
-
 pub const EXCHANGE_PROGRAM_ID: [u8; 32] = [
     3, 147, 111, 103, 210, 47, 14, 213, 108, 116, 49, 115, 232, 171, 14, 111, 167, 140, 221, 234,
     33, 70, 185, 192, 42, 31, 141, 152, 0, 0, 0, 0,
 ];
 
-pub fn check_id(program_id: &Pubkey) -> bool {
-    program_id.as_ref() == EXCHANGE_PROGRAM_ID
-}
-
-pub fn id() -> Pubkey {
-    Pubkey::new(&EXCHANGE_PROGRAM_ID)
-}
+solana_sdk::solana_program_id!(EXCHANGE_PROGRAM_ID);