fix: example errors

Author: Neerajpathak07

lib/node_modules/@stdlib/math/base/special/ceil2f/README.md

@@ -86,7 +86,6 @@ v = ceil2f( NaN );
 
 ```javascript
 var randu = require( '@stdlib/random/base/randu' );
-var ceil2f = require( '@stdlib/math/base/special/ceil2f' );
 
 var x;
 var v;