f: update todo md

Author: matiasedgeandnode

IndexingPaymentsTodo.md

@@ -1,13 +1,13 @@
 # Still pending
 
-* Remove extension if I can fit everything in one service?
 * `require(provision.tokens != 0, DisputeManagerZeroTokens());` - Document or fix?
 * Check code coverage
 * Don't love cancel agreement on stop service / close stale allocation.
 * Arbitration Charter: Update to support disputing IndexingFee.
 
 # Done
 
+* DONE: ~~* Remove extension if I can fit everything in one service?~~
 * DONE: ~~* One Interface for all subgraph~~
 * DONE: ~~* Missing Upgrade event for subgraph service~~
 * DONE: ~~* Check contract size~~