Open Facebook and log in
Go to your profile
Click Photos
Open the album that contains the photos
Click the three dots on a photo
Select Delete photo
Repeat for each photo you want to remove
To delete multiple photos faster, open each photo in the album and delete them one by one
If the photos are in an album you created, open the album and use the album options to delete photos individually
On mobile, tap your profile, then Photos, then the photo, then the three dots, then Delete photo
Confirm the deletion when prompted