How to remove spam “Likes” from WordPress posts:
1. “Edit” the post in question, in the usual Post Editor.
2. Look over on the right-hand sidebar, and scroll down.
3. There’s a “Likes and Shares” tab in the Post Editor. Uncheck the “Show Likes” check-box.
4. Scroll back up the sidebar, and click the “Update” button.
This works on both free and hosted WordPress blogs. Be aware that the above is using the Classic Editor, and things may look a little different if the newer Editor interface is being used.
You can also turn off Avatars (personal icons), if those are too spammy. The check-box for that is in: Dashboard | Settings | Discussion | Avatars | Avatar Display.