diff --git a/Calendar/DisplayAdapter.py b/Calendar/DisplayAdapter.py
index b29be19..10aac7e 100644
--- a/Calendar/DisplayAdapter.py
+++ b/Calendar/DisplayAdapter.py
@@ -6,7 +6,4 @@ class DisplayAdapter (object):
 		raise NotImplementedError("Functions needs to be implemented")
 
 	def calibrate (self):
-		raise NotImplementedError("Functions needs to be implemented")
-
-	def sleep (self):
 		raise NotImplementedError("Functions needs to be implemented")
\ No newline at end of file