How to remove a Meta Tag created by a WordPress plugin?

You need to find the hook responsible for printing this line in HTML. Usually, this is an action attached to wp_head . After that, we use remove_action or remove_filter to remove the hook .

We will have to pay attention if the hook is inside another and what the priority of each one. If the plugin / theme uses something like this:

add_action( $nome_do_hook, $funcao_de_retorno, $prioridade, $parametros );
add_action( 'wp_head', 'funcao_de_retorno', 11, 2 );

The remove_action will be:

remove_action( 'wp_head', 'funcao_de_retorno', 11 );

If the priority is 10 or is not declared, you do not have to put it because 10 is the default value. Parameters do not matter.

It gets a bit more complex when the plugin uses OOP. Some programmers leave the anonymous objects, causing this type of problem . But in the case of Visual Composer, it's easy to access the class:

add_action( 'init', function() 
{
    if( class_exists( 'WPBakeryVisualComposer') )
        remove_action( 'wp_head', array( WPBakeryVisualComposer::getInstance(), 'addMetaData' ) );
}, 11 ); // <-- a prioridade padrão não teve efeito, usando uma menos importante deu certo

Searching for Powered by within the plugin files, we see that this is added by $this->composer->addAction('wp_head', 'addMetaData'); , and that code is within init with default priority.

The @brasofilo response was correct, however, it seems to have changed as cadastram the action and you need to change from:

remove_action( 'wp_head', array( WPBakeryVisualComposer::getInstance(), 'addMetaData' ) );

To:

remove_action('wp_head', array(visual_composer(), 'addMetaData'));

With me I made a mistake and found this solution in their support at CodeCanyon.