Remove stray apostrophe

Author: kgryte

lib/node_modules/@stdlib/iter/dedupe/README.md

@@ -162,7 +162,7 @@ var bool = it.next().done;
     // returns true
     ```
 
--   Uniqueness is determined according to strict equality. Accordingly, object's are **not** checked for deep equality.
+-   Uniqueness is determined according to strict equality. Accordingly, objects are **not** checked for deep equality.
 
     ```javascript
     var array2iterator = require( '@stdlib/array/to-iterator' );