Fixed bytes_argument_type

Encoding to bytes was breaking for nonempty bytes args.

moonworm/generators/brownie_contract.py.template

@@ -28,10 +28,7 @@ def boolean_argument_type(raw_value: str) -> bool:
         f"Invalid boolean argument: {{raw_value}}. Value must be one of: {{','.join(TRUE_VALUES + FALSE_VALUES)}}"
     )
 
-def bytes_argument_type(raw_value: str) -> Union[str, bytes]:
-    # Have had issues with empty string in the past. Easier to convert it to empty byte string
-    if raw_value == "":
-        return b""
+def bytes_argument_type(raw_value: str) -> str:
     return raw_value
 
 def get_abi_json(abi_name: str) -> List[Dict[str, Any]]: