function shop_remove_attributes( $attributes ) {
if( is_shop() ){
if( isset( $attributes['pa_color'] ) ){
unset( $attributes['pa_color'] );
}
if( isset( $attributes['pa_color2'] ) ){
unset( $attributes['pa_color2'] );
}
}
return $attributes;
}
add_filter( 'woocommerce_product_get_attributes', 'shop_remove_attributes' );