[Support request] Remove Break from Text Widget Heading

As you can see, a <br /> is generated at the end.

I searched the internet, and some people recommended to add this in WordPress.
remove_filter(‘widget_text_content’, ‘wpautop’);
remove_filter(‘the_content’, ‘wpautop’);

Could you recommend in which hook should I add this. Or is there a specific place to add these.

Thanks,
Vinai