diff --git a/plenum/common/timer.py b/plenum/common/timer.py
index <HASH>..<HASH> 100644
--- a/plenum/common/timer.py
+++ b/plenum/common/timer.py
@@ -7,16 +7,12 @@ import time
 from sortedcontainers import SortedListWithKey
 
 
-# TODO: Consider renaming this into Scheduler?
 class TimerService(ABC):
     @abstractmethod
     def get_current_time(self) -> float:
         pass
 
     @abstractmethod
-    # TODO: Swapping callback and delay would allow defaulting delay to zero,
-    #  effectively simplifying use-case when we want delay execution of some code
-    #  just to allow some other work to run
     def schedule(self, delay: int, callback: Callable):
         pass
INDY-<I>: Revert comments to TimerService