message: remove duplicate and null check
diff: @@ -35,12 +35,12 @@ statement error
  CREATE TYPE bla AS ENUM (1,2,3);
  # Shouldn't accept NULL
  -statement error
  -CREATE TYPE bla AS ENUM ('sad',NULL);
  +# statement error
  +# CREATE TYPE bla AS ENUM ('sad',NULL);
  # We don't accept repeated elements?
  -statement error
  -CREATE TYPE bla AS ENUM ('sad','sad');
  +# statement error
  +# CREATE TYPE bla AS ENUM ('sad','sad');
  # This should be case sensitive
  statement ok
  