Got it.
Here is your solution.
1. Go to wp-content/themes/customizr/parts.
2. Open class-footer-footer_main.php file.
3. Delete the lines from 137 to 160.
The code should be
/**
* Footer Credits call back functions
* Can be filtered using the $site_credits, $tc_credits parameters
*
*
* @package Customizr
* @since Customizr 3.0.6
*/
function tc_colophon_center_block() {
echo apply_filters(
'tc_credits_display',
sprintf('<div class="%1$s">%2$s</div>',
apply_filters( 'tc_colophon_center_block_class', 'span4 credits' ),
sprintf( '<p> · © %1$s <a href="%2$s" title="%3$s" rel="bookmark">%3$s</a> · Designed by %4$s ·</p>',
esc_attr( date( 'Y' ) ),
esc_url( home_url() ),
esc_attr(get_bloginfo()),
'<a href="'.TC_WEBSITE.'">Themes & Co</a>'
)
)
);
}
You can delete the code from parent theme, but i would suggest you to use child theme.