exc: Remove unused SettingsError

mopidy/exceptions.py

@@ -16,10 +16,6 @@ class MopidyException(Exception):
         self._message = message
 
 
-class SettingsError(MopidyException):
-    pass
-
-
 class ConfigError(MopidyException):
     def __init__(self, errors):
         self._errors = errors

mopidy/utils/process.py

@@ -65,8 +65,6 @@ class BaseThread(threading.Thread):
             self.run_inside_try()
         except KeyboardInterrupt:
             logger.info('Interrupted by user')
-        except exceptions.SettingsError as e:
-            logger.error(e.message)
         except ImportError as e:
             logger.error(e)
         except ActorDeadError as e:

tests/exceptions_test.py

@@ -12,10 +12,6 @@ class ExceptionsTest(unittest.TestCase):
         self.assertEqual(exc.message, 'foo')
         self.assertEqual(str(exc), 'foo')
 
-    def test_settings_error_is_a_mopidy_exception(self):
-        self.assert_(issubclass(
-            exceptions.SettingsError, exceptions.MopidyException))
-
     def test_optional_dependency_error_is_a_mopidy_exception(self):
         self.assert_(issubclass(
             exceptions.OptionalDependencyError, exceptions.MopidyException))