If you want to delete only the profile data and keep your real data then run the below SQl on your database manager.
DELETE FROM `catalog_product_entity` WHERE `sku` LIKE 'product_dynamic_%';
DELETE FROM `catalog_product_entity` WHERE `sku` LIKE 'simple_product_%';
DELETE FROM `catalog_product_entity` WHERE `sku` LIKE 'Configurable Product%'; 'configurable_product_%';
/***************************************************/
DELETE FROM eav_attribute_option WHERE attribute_id IN ( SELECT attribute_id FROM eav_attribute WHERE attribute_code LIKE "attribute%");
DELETE FROM eav_attribute_option_value WHERE option_id NOT IN ( SELECT option_id FROM eav_attribute_option );
DELETE FROM eav_attribute_label WHERE attribute_id IN ( SELECT attribute_id FROM eav_attribute WHERE attribute_code LIKE "attribute%");
DELETE FROM eav_attribute WHERE attribute_code LIKE "attribute%";
DELETE FROM eav_attribute_group WHERE attribute_set_id IN ( SELECT attribute_set_id FROM eav_attribute_set WHERE attribute_set_name LIKE "Product Set%" );
DELETE FROM eav_attribute_set WHERE attribute_set_name LIKE "Product Set%";
Then Reindex all
php bin/magento indexer:reindex
For now I have deleted Dummy data Categories manually from the admin area. You have to delete those all categories having name "Category*".