test(ledger): empty block cbor for byron round-trip test (#1283)

Signed-off-by: Chris Gianelloni <wolf31o2@blinklabs.io>

Author: wolf31o2

ledger/byron/block_test.go

@@ -50,6 +50,8 @@ func TestByronBlock_CborRoundTrip_UsingCborEncode(t *testing.T) {
 if err != nil {
 t.Fatalf("Failed to unmarshal CBOR data into ByronBlock: %v", err)
 }
+// Reset stored CBOR to nil
+block.SetCbor(nil)
 
 // Re-encode using the cbor Encode function
 encoded, err := cbor.Encode(block)