Remove useless re-raise of cancellation

electrumx_server.py

@@ -42,12 +42,8 @@ def main_loop():
         loop.add_signal_handler(getattr(signal, signame),
                                 partial(on_signal, signame))
 
-    try:
+    loop.run_until_complete(future)
-        loop.run_until_complete(future)
+    loop.close()
-    except asyncio.CancelledError:
-        pass
-    finally:
-        loop.close()
 
 
 def main():

server/block_processor.py

@@ -388,7 +388,6 @@ class BlockProcessor(server.db.DB):
             self.on_cancel()
             # This lets the asyncio subsystem process futures cancellations
             await asyncio.sleep(0)
-            raise
 
     def on_cancel(self):
         '''Called when the main loop is cancelled.