OptionalUnsigned is part of bacpypes3, no need to define it

BAC0/core/proprietary_objects/__init__.py

@@ -1,45 +0,0 @@
-from typing import Any as Optional
-
-from bacpypes3.errors import InvalidTag
-from bacpypes3.primitivedata import Tag, TagClass, TagList, TagNumber, Unsigned
-
-
-class OptionalUnsigned(Unsigned):
-    """
-    This is a special case where a vendor will send NULL values for Unsigned
-    """
-
-    @classmethod
-    def decode(cls, tag_list: TagList) -> Optional[Unsigned]:
-        """Decode an unsigned element from a tag list."""
-
-        tag: Optional[Tag] = tag_list.pop()
-        if not tag:
-            raise InvalidTag("unsigned application tag expected")
-        if tag.tag_class == TagClass.application:
-            if cls._context is not None:
-                raise InvalidTag(f"unsigned context tag {cls._context} expected")
-            if tag.tag_number != TagNumber.unsigned:
-                if tag.tag_number == TagNumber.null:
-                    return None
-                else:
-                    raise InvalidTag(
-                        f"unsigned application tag expected, got {tag.tag_number}"
-                    )
-        elif tag.tag_class == TagClass.context:
-            if cls._context is None:
-                raise InvalidTag("unsigned application tag expected")
-            if tag.tag_number != cls._context:
-                raise InvalidTag("mismatched context")
-        else:
-            raise InvalidTag("unexpected opening/closing tag")
-        if len(tag.tag_data) < 1:
-            raise InvalidTag("invalid tag length")
-
-        # get the data
-        value = 0
-        for c in tag.tag_data:
-            value = (value << 8) + c
-
-        # return an instance of this thing
-        return cls(value)