diff --git a/dvc/config.py b/dvc/config.py
index f8a402b73c..ce7f73289c 100644
--- a/dvc/config.py
+++ b/dvc/config.py
@@ -41,18 +41,6 @@ class RemoteNotFoundError(RemoteConfigError):
     pass
 
 
-class MachineConfigError(ConfigError):
-    pass
-
-
-class NoMachineError(MachineConfigError):
-    pass
-
-
-class MachineNotFoundError(MachineConfigError):
-    pass
-
-
 @memoize
 def get_compiled_schema():
     from voluptuous import Schema