Remove NetworkId parameter from buildTransaction

Author: klntsky

README.md

@@ -10,8 +10,7 @@ Here's a short overview of the interface to give an impression of how it works:
 
 ```purescript
 buildTransaction
-  :: NetworkId
-  -> Array TransactionBuilderStep
+  :: Array TransactionBuilderStep
   -> Either TxBuildError Transaction
 
 data TransactionBuilderStep

src/Cardano/Transaction/Builder.purs

@@ -331,11 +331,10 @@ explainTxBuildError NoTransactionNetworkId =
 type BuilderM a = StateT Context (Except TxBuildError) a
 
 buildTransaction
-  :: NetworkId
-  -> Array TransactionBuilderStep
+  :: Array TransactionBuilderStep
   -> Either TxBuildError Transaction
-buildTransaction networkId =
-  modifyTransaction (Transaction.empty # _body <<< _networkId .~ Just networkId)
+buildTransaction =
+  modifyTransaction Transaction.empty
 
 modifyTransaction
   :: Transaction