docs: remove links

Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: Planeshifter

lib/node_modules/@stdlib/stats/incr/nanmmse/README.md

@@ -160,12 +160,6 @@ console.log( accumulator() );
 
 <!-- <related-links> -->
 
-[@stdlib/stats/incr/mrmse]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/stats/incr/mrmse
-
-[@stdlib/stats/incr/mrss]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/stats/incr/mrss
-
-[@stdlib/stats/incr/mse]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/stats/incr/mse
-
 <!-- </related-links> -->
 
 </section>