1.First transfer file from your phone to your computer obviously lol
2.right click the file>Open With>paint
3.Use the first tool in the second column (looks like a rectangle with dotted line)
Highlight the part of the picture you would like to keep (keep parts of your house or anything else that could identify you out of the picture)
4.Click edit in the top left then cut
5.Then choose file>New to create a new picture
6.then click edit paste
7.Save this file under a diffrent name and upload this picture to the site

There will be no GPS data stored in the picture if you do it this way.