Fix clippy warnings

Author: romac

code/crates/core-consensus/src/handle/signature.rs

@@ -62,6 +62,8 @@ where
     Ok(result)
 }
 
+// NOTE: Will be used again in #997
+#[allow(dead_code)]
 pub async fn verify_polka_certificate<Ctx>(
     co: &Co<Ctx>,
     certificate: PolkaCertificate<Ctx>,

code/crates/starknet/host/src/codec.rs

@@ -457,6 +457,8 @@ impl Codec<CommitCertificate<MockContext>> for ProtobufCodec {
     }
 }
 
+// NOTE: Will be used again in #997
+#[allow(dead_code)]
 pub(crate) fn encode_polka_certificate(
     certificate: &PolkaCertificate<MockContext>,
 ) -> Result<proto::sync::PolkaCertificate, ProtoError> {
@@ -480,6 +482,8 @@ pub(crate) fn encode_polka_certificate(
     })
 }
 
+// NOTE: Will be used again in #997
+#[allow(dead_code)]
 pub(crate) fn decode_polka_certificate(
     certificate: proto::sync::PolkaCertificate,
 ) -> Result<PolkaCertificate<MockContext>, ProtoError> {
@@ -558,10 +562,14 @@ impl Codec<sync::RawDecidedValue<MockContext>> for ProtobufCodec {
     }
 }
 
+// NOTE: Will be used again in #997
+#[allow(dead_code)]
 pub(crate) fn encode_vote(vote: &SignedVote<MockContext>) -> Result<proto::Vote, ProtoError> {
     vote.message.to_proto()
 }
 
+// NOTE: Will be used again in #997
+#[allow(dead_code)]
 pub(crate) fn decode_vote(msg: proto::Vote) -> Result<SignedVote<MockContext>, ProtoError> {
     let signature = Signature::test();
     let vote = Vote::from_proto(msg)?;

code/examples/channel/src/state.rs

@@ -410,7 +410,7 @@ impl State {
     /// validators from the genesis validator set.
     pub fn get_validator_set(&self, height: Height) -> ValidatorSet {
         let num_validators = self.genesis.validator_set.len();
-        let selection_size = (num_validators + 1) / 2;
+        let selection_size = num_validators.div_ceil(2);
 
         if num_validators <= selection_size {
             return self.genesis.validator_set.clone();