Update doc/contributing/maintaining-types-for-nodejs.md

Co-authored-by: Derek Lewis <[email protected]>

Author: mahmoud-moursy

doc/contributing/maintaining-types-for-nodejs.md

@@ -13,8 +13,6 @@ maintained.
 
 The different options were discussed as part of the [next-10][] effort and it
 was agreed that maintaining them externally is the best approach.
-[next-10][]
-effort and it was agreed that maintaining them externally is the best approach.
 Some of the advantages to this approach include:
 
 * Node.js maintainers do not need to be familiar with any given type