The answer involves the command
bypass. If you really want to delete files and/or folders (directories) from Time Machine (or anything else), this will do it.
In my case, I needed to remove Time Machine files from a external disk that contained other files. I could not simple reformat the partition.
bypass is hidden relatively deep in OS X. In Yosemite, the full path to
bypass is shown below.
Since this is a fairly long path, I suggest when first opening a Terminal application window, enter the command shown below to create an alias.
Now. if you really want to show your computer who is in charge, enter the remove command as follows.
bypass sudo rm -rf name
name can be either a file or directory. Be warned, this does not put anything in the Trash. The file or directory is permanently deleted. If used on a directory, the action is recursive.