Cleanup comment

Author: r4victor

src/dstack/_internal/server/background/pipeline_tasks/base.py

@@ -358,7 +358,7 @@ class _NowPlaceholder:
 instead of `get_current_time()` to have the same current time for all updates in the transaction.
 """
 
-# Timestamp value stored in update maps before being resolved to current time.
+
 UpdateMapDateTime = Union[datetime, _NowPlaceholder]