You can remove WordPress hooks action with function name. if you are not able to remove action using remove_action() core function.

Remove action hook with function name

<?php
function remove_filters_with_method_name( $hook_name = '', $method_name = '', $priority = 0 ) {
    global $wp_filter;
    // Take only filters on right hook name and priority
    if ( ! isset( $wp_filter[ $hook_name ][ $priority ] ) || ! is_array( $wp_filter[ $hook_name ][ $priority ] ) ) {
        return false;
    }
    // Loop on filters registered
    foreach ( (array) $wp_filter[ $hook_name ][ $priority ] as $unique_id => $filter_array ) {
        // Test if filter is an array ! (always for class/method)
        if ( isset( $filter_array['function'] ) && is_array( $filter_array['function'] ) ) {
            // Test if object is a class and method is equal to param !
            if ( is_object( $filter_array['function'][0] ) && get_class( $filter_array['function'][0] ) && $filter_array['function'][1] == $method_name ) {
                // Test for WordPress >= 4.7 WP_Hook class (https://make.wordpress.org/core/2016/09/08/wp_hook-next-generation-actions-and-filters/)
                if ( is_a( $wp_filter[ $hook_name ], 'WP_Hook' ) ) {
                    unset( $wp_filter[ $hook_name ]->callbacks[ $priority ][ $unique_id ] );
                } else {
                    unset( $wp_filter[ $hook_name ][ $priority ][ $unique_id ] );
                }
            }
        }
    }
    return false;
}
remove_filters_with_method_name( 'login_head', 'customLoginLogo', 10 );