<pre>
Add below code in function.php
add_filter( 'wpcf7_load_js', '__return_false' );
add_filter( 'wpcf7_load_css', '__return_false' );
</pre>

Please find below url for download this RSS Feed plugin

https://app.box.com/s/xj2axiepys3rrgbxjd0qde5dhxkzbbbw