diff --git a/swh/graphql/resolvers/scalars.py b/swh/graphql/resolvers/scalars.py
index fdc6621..61948cf 100644
--- a/swh/graphql/resolvers/scalars.py
+++ b/swh/graphql/resolvers/scalars.py
@@ -1,51 +1,40 @@
 from ariadne import ScalarType
 
 from swh.model.fields.hashes import validate_sha1_git
 
 # from swh.model.swhids import QualifiedSWHID
 
 datetime_scalar = ScalarType("DateTime")
 swhid_scalar = ScalarType("SWHID")
 sha1_scalar = ScalarType("Sha1")
 binary_text_scalar = ScalarType("BinaryText")
 datetimezone_scalar = ScalarType("DateTimeZone")
 
 
 @datetime_scalar.serializer
 def serialize_datetime(value):
     # FIXME, consider timezone, use core functions
     return value.timestamp()
 
 
 @sha1_scalar.serializer
 def serialize_sha1(value):
     return value.hex()
 
 
 @sha1_scalar.value_parser
 def validate_sha1(value):
     # FIXME, handle the error and raise a Graphql one
     validate_sha1_git(value)
     return value
 
 
-# @swhid_scalar.value_parser
-# def validate_sha1(value):
-#     # FIXME, handle the error here
-#     validate_sha1_git(value)
-#     return value
-
-
 @binary_text_scalar.serializer
 def serialize_binary_text(value):
     # FIXME
     return value.decode("utf-8")
 
 
 @datetimezone_scalar.serializer
 def serialize_datetimezone(value):
     return value.to_datetime().timestamp()
-
-
-class SWHIDScalar(ScalarType):
-    pass