Within the tab called "Operations", you can remove the building you are working with from Pythagoras Web.
To remove a building from Pythagoras Web:
Go to the building card (see image below).
If you are not already on the tab in question, click the tab called "Operations" (see the first image below). Clicking the tab called "Operations" will give you access to a button called "Delete" (see the second image below).
Click the button called "Delete" (see the first image below). When you click the button called "Delete", a dialog holding the following question will open: "Are you sure you want to delete this building?" (see the second image below).
Click "Delete" in the dialog (see image below). When you click "Delete" in the dialog, the building you are working with will be removed from Pythagoras Web.
