Remove customizer section from parent theme

Hi guys,
Congrats for Zerif! It’s an amazing theme!

I’m having a problem developing a zerif-lite’s child theme.
I can’t remove some sections in customizer.
I tried doing the same steps as other child themes of zerif-lite like zifer and responsive boat but it just doesn’t work, I don’t know why…I guess I’m missing something really obvious.

I just want to remove some sections, controls and settings from the parent theme.

This is my functions.php, and the code above doesn’t work on my child theme, all i want to remove is still there

add_action('customize_register', 'my_customizer');
function my_customizer($wp_customize)
{
    /*************  OUR FOCUS SECTION ******************/
    $wp_customize->remove_section( 'zerif_ourfocus_section');
    /* show/hide */
    $wp_customize->remove_setting( 'zerif_ourfocus_show');
    $wp_customize->remove_control( 'zerif_ourfocus_show');
    /* our focus title */
    $wp_customize->remove_setting( 'zerif_ourfocus_title');
    $wp_customize->remove_control( 'zerif_ourfocus_title');
    /* our focus subtitle */
    $wp_customize->remove_setting( 'zerif_ourfocus_subtitle');
    $wp_customize->remove_control( 'zerif_ourfocus_subtitle');

}