With the twitter-unfollow.js or instagram-unfollow.js files included in the codes, you will be able to easily remove the followers you follow who do not follow you.
1 - Select the code for Twitter and Instagram and copy all.
2 - Enter the code you copied on Twitter or Instagram and click on the ones you follow. Then right click and continue by saying "inspect the tutorial".
3 - From the item control tab, come to the console section and paste the given code.