I've downloaded a couple CC lots and used Clean Installer to get them in the game, they installed into the Teleport folder. I didn't really like some of them. Is there a safe way to remove them?

If you haven't started your game yet, you can remove the lots from the Teleport folder and they won't be installed.

When you install lots with the Clean Installer and you only want the CC they come with, you can untick the lot and it won't be installed.

If you don't want the CC, it can be deleted from your Downloads folder. Some of the CC may be needed for a lot to work properly, but if you're not keeping the lot, you don't need to keep the CC. If you want to keep a lot but not the CC it comes with, the CC will usually be replaced with EAxis items.

I think the installed ones can be deleted from the LotCatalog folder (it will be one of the "cx_000000XX" files with the date/time you started your game after installing them). If you have several files with the same time stamp and don't want to delete all of them, you should be able to open them up in SimPE and check the name and images to figure out which lots they are.

A bit unsure if it's safe to delete them from ingame, but I think it is (I'm not sure about the EAxis lots, including the one in the "occupied" bin).

Lots are not CC, they are Maxis content. Someone can add and package CC with a lot, but that is just regular CC in your download folder.

Delete the lot from the lot bin.
If you don't want the CC included remove that from your download folder.