Use hashDrepMetadata from cardano-api

The simplified hashDRepMetadata no longer checks for the size of the DRep metadata, instead it only return the hash of the file given by the user.

Remove no longer needed errors.

cardano-cli/src/Cardano/CLI/EraBased/Run/Governance/DRep.hs

@@ -164,10 +164,7 @@ runGovernanceDRepMetadataHashCmd
       , mOutFile
       } = do
   metadataBytes <- firstExceptT ReadFileError $ newExceptT (readByteStringFile metadataFile)
-  (_metadata, metadataHash) <-
-    firstExceptT GovernanceCmdDRepMetadataValidationError
-     . hoistEither
-     $ validateAndHashDRepMetadata metadataBytes
+  let (_metadata, metadataHash) = hashDRepMetadata metadataBytes
   firstExceptT WriteFileError
     . newExceptT
     . writeByteStringOutput mOutFile

cardano-cli/src/Cardano/CLI/Types/Errors/GovernanceCmdError.hs

@@ -50,7 +50,6 @@ data GovernanceCmdError
   | GovernanceCmdDecoderError !DecoderError
   | GovernanceCmdVerifyPollError !GovernancePollError
   | GovernanceCmdWriteFileError !(FileError ())
-  | GovernanceCmdDRepMetadataValidationError !DRepMetadataValidationError
   -- Legacy - remove me after cardano-cli transitions to new era based structure
   | GovernanceCmdMIRCertNotSupportedInConway
   | GovernanceCmdGenesisDelegationNotSupportedInConway
@@ -108,8 +107,6 @@ instance Error GovernanceCmdError where
       pretty $ renderGovernancePollError pollError
     GovernanceCmdWriteFileError fileError ->
       "Cannot write file: " <> prettyError fileError
-    GovernanceCmdDRepMetadataValidationError e ->
-      "DRep metadata validation error: " <> prettyError e
     GovernanceCmdMIRCertNotSupportedInConway ->
       "MIR certificates are not supported in Conway era onwards."
     GovernanceCmdGenesisDelegationNotSupportedInConway ->