Remove unused conversion functions from cardano-wallet-primitive. (#…

…4294)

## Issue

None. Noticed while reviewing code.

## Description

This PR removes several conversion functions that are no longer used.
Conversion functions pertaining to recent eras are retained.

lib/primitive/lib/Cardano/Wallet/Primitive/Ledger/Convert.hs

@@ -37,11 +37,7 @@ module Cardano.Wallet.Primitive.Ledger.Convert
       --   types
     , Convert (..)
 
-      -- * Conversions for transaction outputs
-    , toShelleyTxOut
-    , toAllegraTxOut
-    , toMaryTxOut
-    , toAlonzoTxOut
+      -- * Conversions for transaction outputs in recent eras
     , toBabbageTxOut
     , toConwayTxOut
     , fromBabbageTxOut
@@ -119,28 +115,21 @@ import Numeric.Natural
     ( Natural
     )
 import Ouroboros.Consensus.Shelley.Eras
-    ( StandardAllegra
-    , StandardAlonzo
-    , StandardBabbage
+    ( StandardBabbage
     , StandardConway
     , StandardCrypto
-    , StandardMary
-    , StandardShelley
     )
 
 import qualified Cardano.Crypto.Hash.Class as Crypto
 import qualified Cardano.Ledger.Address as Ledger
 import qualified Cardano.Ledger.Allegra.Scripts as Scripts
-import qualified Cardano.Ledger.Alonzo as Alonzo
-import qualified Cardano.Ledger.Alonzo.TxBody as Alonzo
 import qualified Cardano.Ledger.Babbage as Babbage
 import qualified Cardano.Ledger.Babbage.TxBody as Babbage
 import qualified Cardano.Ledger.Core as LCore
 import qualified Cardano.Ledger.Keys as Ledger
 import qualified Cardano.Ledger.Mary.Value as Ledger
 import qualified Cardano.Ledger.SafeHash as SafeHash
 import qualified Cardano.Ledger.Shelley.API as Ledger
-import qualified Cardano.Ledger.Shelley.TxBody as Shelley
 import qualified Cardano.Wallet.Primitive.Types.Coin as Coin
 import qualified Cardano.Wallet.Primitive.Types.TokenBundle as TokenBundle
 import qualified Cardano.Wallet.Primitive.Types.TokenMap as TokenMap
@@ -332,36 +321,9 @@ toWalletAddress :: Ledger.Addr StandardCrypto -> Address
 toWalletAddress = Address . Ledger.serialiseAddr
 
 --------------------------------------------------------------------------------
--- Conversions for 'TxOut'
+-- Conversions for 'TxOut' (in recent eras)
 --------------------------------------------------------------------------------
 
-toShelleyTxOut
-    :: TxOut
-    -> Shelley.ShelleyTxOut StandardShelley
-toShelleyTxOut (TxOut addr bundle) =
-    Shelley.ShelleyTxOut (toLedger addr) (toLedger (TokenBundle.coin bundle))
-
-toAllegraTxOut
-    :: TxOut
-    -> Shelley.ShelleyTxOut StandardAllegra
-toAllegraTxOut (TxOut addr bundle) =
-    Shelley.ShelleyTxOut (toLedger addr) (toLedger (TokenBundle.coin bundle))
-
-toMaryTxOut
-    :: TxOut
-    -> Shelley.ShelleyTxOut StandardMary
-toMaryTxOut (TxOut addr bundle) =
-    Shelley.ShelleyTxOut (toLedger addr) (toLedger bundle)
-
-toAlonzoTxOut
-    :: TxOut
-    -> Alonzo.AlonzoTxOut StandardAlonzo
-toAlonzoTxOut (TxOut addr bundle) =
-    Alonzo.AlonzoTxOut
-        (toLedger addr)
-        (toLedger bundle)
-        Ledger.SNothing
-
 toBabbageTxOut
     :: HasCallStack
     => TxOut