diff --git a/semvertag/_types.py b/semvertag/_types.py
index 2eca207..7cbaf5e 100644
--- a/semvertag/_types.py
+++ b/semvertag/_types.py
@@ -1,6 +1,5 @@
 import dataclasses
 import enum
-import typing
 
 
 class Bump(enum.Enum):
@@ -10,12 +9,6 @@ class Bump(enum.Enum):
     MAJOR = "major"
 
 
-@dataclasses.dataclass(frozen=True, slots=True, kw_only=True)
-class ConfigSource:
-    layer: typing.Literal["cli", "env", "default"]
-    detail: str
-
-
 @dataclasses.dataclass(frozen=True, slots=True, kw_only=True)
 class RunResult:
     schema_version: str = "1.0"