Remove unused code in the Ethereum processor

processor/ethereum/src/primitives/block.rs

@@ -16,19 +16,10 @@ use crate::{output::Output, transaction::Eventuality};
 pub(crate) struct Epoch {
   // The hash of the block which ended the prior Epoch.
   pub(crate) prior_end_hash: [u8; 32],
-  // The first block number within this Epoch.
-  pub(crate) start: u64,
   // The hash of the last block within this Epoch.
   pub(crate) end_hash: [u8; 32],
 }
 
-impl Epoch {
-  // The block number of the last block within this epoch.
-  fn end(&self) -> u64 {
-    self.start + 31
-  }
-}
-
 impl primitives::BlockHeader for Epoch {
   fn id(&self) -> [u8; 32] {
     self.end_hash

processor/ethereum/src/primitives/machine.rs

@@ -102,9 +102,9 @@ impl SignMachine<Transaction> for ActionSignMachine {
     unimplemented!()
   }
   fn from_cache(
-    params: Self::Params,
-    keys: Self::Keys,
-    cache: CachedPreprocess,
+    _params: Self::Params,
+    _keys: Self::Keys,
+    _cache: CachedPreprocess,
   ) -> (Self, Self::Preprocess) {
     unimplemented!()
   }