[recipes] Increase test coverage

infra/bots/recipe_modules/flavor/default_flavor.py

Index: infra/bots/recipe_modules/flavor/default_flavor.py
diff --git a/infra/bots/recipe_modules/flavor/default_flavor.py b/infra/bots/recipe_modules/flavor/default_flavor.py
index f1837c2fba969b7b6d9a8f9b8662bbecef034354..3670457474b9bea9ce0eed84a1aca56fb9c197d8 100644
--- a/infra/bots/recipe_modules/flavor/default_flavor.py
+++ b/infra/bots/recipe_modules/flavor/default_flavor.py
@@ -172,10 +172,6 @@ class DefaultFlavorUtils(object):
     """Like os.path.join(), but for paths on a connected device."""
     return self.m.path.join(*args)
 
-  def device_path_exists(self, path):  # pragma: no cover
-    """Like os.path.exists(), but for paths on a connected device."""
-    return self.m.path.exists(path, infra_step=True)
-
   def copy_directory_contents_to_device(self, host_dir, device_dir):
     """Like shutil.copytree(), but for copying to a connected device."""
     # For "normal" builders who don't have an attached device, we expect
@@ -229,6 +225,3 @@ class DefaultFlavorUtils(object):
   def cleanup_steps(self):
     """Run any device-specific cleanup steps."""
     pass
-
-  def __repr__(self):
-    return '<%s object>' % self.__class__.__name__  # pragma: no cover