resolve comments

Signed-off-by: Alex Chi Z <chi@neon.tech>

pageserver/src/tenant/timeline.rs

@@ -1947,6 +1947,7 @@ impl Timeline {
             .unwrap_or(self.conf.default_tenant_conf.lsn_lease_length_for_ts)
     }
 
+    /// TODO(chi): remove after retiring aux read path
     #[allow(dead_code)]
     pub(crate) fn get_switch_aux_file_policy(&self) -> AuxFilePolicy {
         let tenant_conf = self.tenant_conf.load();

pageserver/src/walredo/apply_neon.rs

@@ -243,6 +243,7 @@ pub(crate) fn apply_in_neon(
             clear,
             will_init,
         } => {
+            use bytes::BufMut;
             if *will_init {
                 assert!(*clear, "init record must be clear to ensure correctness");
             }