docs: remove extra empty line

PR-URL: #7534

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

Author: stdlib-bot

lib/node_modules/@stdlib/stats/strided/smeanors/README.md

@@ -179,7 +179,6 @@ console.log( v );
 
 <!-- C usage documentation. -->
 
-
 <section class="usage">
 
 ### Usage