message: doc: Remove outdated scriptChange TODO comment
diff: @@ -665,8 +665,6 @@ static bool CreateTransactionInternal(
  }
  // Create change script that will be used if we need change
  - // TODO: pass in scriptChange instead of reservedest so
  - // change transaction isn't always pay-to-bitcoin-address
  CScript scriptChange;
  // coin control: send change to custom address
  