Is the current profit from AdSense halal after removing musical content from the site and disabling download links, knowing that it still displays Google ads and that I have performed the filtering process? And how can I repent and rectify the past use of money from AdSense, from when music was available on the site, which was spent on purchasing a computer, phone, and clothes?

If the advertisement is permissible, then the money earned from it is permissible and is not affected by the presence of music on the site, because the money is in exchange for the permissible advertisement. There is no harm in benefiting from the purchases. However, if the money was earned from a forbidden benefit, then the amount of money, not the purchases, must be disposed of. Some scholars are of the view that whoever earns unlawful money and then repents, may keep what has passed, especially if they were ignorant of the prohibition.