Oh neat I recognize you from Twitch and nice to see you again. I remember this happening to me with ponds. I looked up the situation at answers EA and found this thread for you. https://answers.ea.com/t5/Bug-Reports/FIXED-Objects-in-the-street-cannot-be-moved-or-deleted/td-p/3658211/page/3
Solution to it is using cheats and steps for it from the that thread.
"1. CTRL + SHIFT + C
2. Enter "testingcheats on"
3. Hold down SHIFT while left-clicking on the item
4. Select "set as head" (make sure your active sim is on their lot while doing this)
5. Hold down SHIFT while left-clicking on your active sim (your item should show up as your sims head which is actually quite hilarious)
6. Select "reset object (debug)" and the object you want to get rid of should appear beside your sim so you can then go ahead and get rid of it"
