How do you remove the donate button from Testimonials Premium
See https://gist.github.com/michael-cannon/6504163 for the code to put into your theme's `functions.php` file.
Alternately, comment out the line `add_filter( 'plugin_row_meta', array( $this, 'plugin_row_meta' ), 10, 2 );` in `testimonials-widget-premium.php`.
Even better, check "Disable Donate Text?" under WP Admin > Testimonials > Settings, Premium tab.