Update ethereum-template

Remove unecessary pb module, import models from tycho-substreams instead.

Integrate package directly into workspace.

substreams/ethereum-template/src/lib.rs

@@ -1,13 +1,9 @@
-
 use substreams_ethereum::pb::eth;
-
-use pb::tycho::evm::v1::{self as tycho};
-
-mod pb;
+mod modules;
 
 #[substreams::handlers::map]
 fn map_changes(
     block: eth::v2::Block,
 ) -> Result<tycho::BlockContractChanges, substreams::errors::Error> {
     todo!("Not implemented")
-}
+}