Remove unused error handling

We're not opening any files now in this parser so we can remove this
catch

Author: dbatten5

src/maison/parsers/toml.py

@@ -39,7 +39,7 @@ def parse_config(self, file: typing.BinaryIO) -> typedefs.ConfigValues:
         """See the Parser.parse_config method."""
         try:
             values = dict(tomllib.load(file))
-        except (FileNotFoundError, tomllib.TOMLDecodeError):
+        except tomllib.TOMLDecodeError:
             return {}
 
         current = values