Update pages/builders/chain-operators/management/operations.mdx

Author: sbvegan

pages/builders/chain-operators/management/operations.mdx

@@ -25,8 +25,6 @@ An orderly shutdown is done in the reverse order to the order in which component
 
 ### Stop `op-proposer`
 
-### Stop `op-proposer`
-
 To stop the proposer, terminate the process directly. This can be done by:
 
 *   Pressing **Ctrl+C** in the terminal running the process