fix(tests): Adjust the expected error message

tests/device_tests/test_msg_signtx_prevhash.py

@@ -1,4 +1,3 @@
-import re
 from hashlib import sha256
 from io import BytesIO
 
@@ -63,10 +62,7 @@ def hash_tx(data: bytes) -> bytes:
 def _check_error_message(value: bytes, model: str, message: str):
     if model != "1":
         if value is None:
-            assert re.match(
-                r"^Failed to decode message: Required field '\w+' was not received$",
-                message,
-            )
+            assert message == "Failed to decode message: Missing"
         else:
             assert message == "Provided prev_hash is invalid."
         return