fix empty lines and remove unused import

Author: basnijholt

adaptive/notebook_integration.py

@@ -3,7 +3,6 @@
 import asyncio
 from contextlib import suppress
 import datetime
-from pkg_resources import parse_version
 import warnings
 
 

adaptive/runner.py

@@ -245,7 +245,7 @@ def _cleanup(self):
     def failed(self):
         """Set of points that failed 'self.retries' times."""
         return set(self.tracebacks) - set(self.to_retry)
-    
+
 
 class BlockingRunner(BaseRunner):
     """Run a learner synchronously in an executor.
@@ -553,6 +553,7 @@ def elapsed_time(self):
             end_time = time.time()
         return end_time - self.start_time
 
+
 # Default runner
 Runner = AsyncRunner