Killing bluetooth dead

[dave@sherohman.org]

I've got a headless server which is endlessly spamming its logs multiple
times per second with:

---
Dec  5 15:22:33 fubar systemd[2097]: Reached target Bluetooth.
Dec  5 15:22:33 fubar systemd[2093386]: Reached target Bluetooth.
Dec  5 15:22:33 fubar systemd[2093386]: Stopped target Bluetooth.
Dec  5 15:22:33 fubar systemd[2097]: Stopped target Bluetooth.
Dec  5 15:22:33 fubar kernel: [2937739.971268] usb 1-14: new full-speed USB device number 119 using xhci_hcd
Dec  5 15:22:33 fubar kernel: [2937740.121486] usb 1-14: New USB device found, idVendor=8087, idProduct=0032, bcdDevice= 0.00
Dec  5 15:22:33 fubar kernel: [2937740.121493] usb 1-14: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Dec  5 15:22:33 fubar kernel: [2937740.124798] Bluetooth: hci0: Reading Intel version information failed (-22)
Dec  5 15:22:33 fubar kernel: [2937740.124813] Bluetooth: hci0: Intel Read version failed (-22)
Dec  5 15:22:33 fubar kernel: [2937740.124972] Bluetooth: hci0: Intel reset sent to retry FW download
Dec  5 15:22:33 fubar kernel: [2937740.125348] usb 1-14: USB disconnect, device number 119
Dec  5 15:22:33 fubar systemd[2046734]: Reached target Bluetooth.
Dec  5 15:22:33 fubar systemd[2046734]: Stopped target Bluetooth.
---

How do I kill bluetooth dead and make this stop?

I do not need help making bluetooth load correctly.  The machine does
not need or want bluetooth connectivity.  If bluetooth were running
successfully, the first and last thing I would do with bluetooth would
be to disable it.

The question is how to make it stop attempting to load bluetooth in the
first place.

Based on some web searches, I have already tried:

- Checking the output of `dpkg --get-selections` for any package names
  mentioning "blue", "tooth", or "bt" - there aren't any, so the obvious
  solution of `apt-get remove --purge bluetooth` doesn't appear to be an
  option

- `rmmod btusb` - this has no apparent effect, probably because
  bluetooth.target loads the mod back in before I even have time to run
  `lsmod` and see if it's still there

- `systemctl X bluetooth.target` for X in (stop, disable, mask) - this
  has also had no apparent effect; even with the target stopped,
  disabled, and masked, the system still keeps reaching it and trying to
  read the Intel version information

- grepping for the text 'bluetooth.target' in all files in /etc/systemd/
  and /usr/lib/systemd/ (so I could find out what 'wants
  bluetooth.target') - no matches were found


-- 
Dave Sherohman