Remove even more pico-debug stragglers (#2425)

cores/rp2040/RP2040USB.cpp

@@ -566,8 +566,6 @@ usbd_class_driver_t const *usbd_app_driver_get_cb(uint8_t *driver_count) {
 
 #elif defined NO_USB
 
-// will ensure backward compatibility with existing code when using pico-debug
-
 #warning "NO_USB selected. No output to Serial will occur!"
 
 #include <Arduino.h>

docs/install.rst

@@ -184,11 +184,9 @@ The first line creates a file with the USB vendor and ID of the Picoprobe and te
 
 Once Picoprobe permissions are set up properly, then select the board "Raspberry Pi Pico (Picoprobe)" in the Tools menu and upload as normal.
 
-Uploading Sketches with pico-debug
+Uploading Sketches with OpenOCD
-----------------------------------
+-------------------------------
-pico-debug differs from Picoprobe in that pico-debug is a virtual debug pod that runs side-by-side on the same RP2040 that you run your code on; so, you only need one RP2040 board instead of two.  pico-debug also differs from Picoprobe in that pico-debug is standards-based; it uses the CMSIS-DAP protocol, which means even software not specially written for the Raspberry Pi Pico can support it.  pico-debug uses OpenOCD to handle your sketch uploads, and debugging can be accomplished with CMSIS-DAP capable debuggers including GDB.
+Under Windows and macOS, any user should be able to access OpenOCD automatically, but under Linux `udev` must be told about the device and to allow normal users access.
-
-Under Windows and macOS, any user should be able to access pico-debug automatically, but under Linux `udev` must be told about the device and to allow normal users access.
 
 To set up user-level access to all CMSIS-DAP adapters on Ubuntu (and other OSes which use `udev`):
 
@@ -199,10 +197,8 @@ To set up user-level access to all CMSIS-DAP adapters on Ubuntu (and other OSes
 
 The first line creates a file that recognizes all CMSIS-DAP adapters and tells UDEV to give users full access to it.  The second causes `udev` to load this new rule.  Note that you will need to unplug and re-plug in your device the first time you create this file, to allow udev to make the device node properly.
 
-Once CMSIS-DAP permissions are set up properly, then select the board "Raspberry Pi Pico (pico-debug)" in the Tools menu.
+Once CMSIS-DAP permissions are set up properly, then select the Upload Method "Picoprobe/Debugprobe (CMSIS-DAP)" in the Tools menu.
 
-When first connecting the USB port to your PC, you must copy pico-debug-gimmecache.uf2 to the Pi Pico to load pico-debug into RAM; after this, upload as normal.
+Debugging with Picoprobe/Debugprobe, OpenOCD, and GDB
-
-Debugging with Picoprobe/pico-debug, OpenOCD, and GDB
 -----------------------------------------------------
-The installed tools include a version of OpenOCD (in the pqt-openocd directory) and GDB (in the pqt-gcc directory).  These may be used to run GDB in an interactive window as documented in the Pico Getting Started manuals from the Raspberry Pi Foundation.  For pico-debug, replace the raspberrypi-swd and picoprobe example OpenOCD arguments of "-f interface/raspberrypi-swd.cfg -f target/rp2040.cfg" or "-f interface/picoprobe.cfg -f target/rp2040.cfg" respectively in the Pico Getting Started manual with "-f board/pico-debug.cfg".
+The installed tools include a version of OpenOCD (in the pqt-openocd directory) and GDB (in the pqt-gcc directory).  These may be used to run GDB in an interactive window as documented in the Pico Getting Started manuals from the Raspberry Pi Foundation.

docs/platformio.rst

@@ -342,7 +342,6 @@ To specify the debugging adapter, use ``debug_tool`` (`documentation <https://do
 * ``jlink``
 * ``raspberrypi-swd``
 * ``blackmagic``
-* ``pico-debug``
 
 These values can also be used in ``upload_protocol`` if you want PlatformIO to upload the regular firmware through this method, which you likely want.
 
@@ -362,25 +361,6 @@ For further information on customizing debug options, like the initial breakpoin
 
     You can obtain precompiled binaries from `here <https://github.com/blackmagic-debug/blackmagic/issues/1364#issuecomment-1503372723>`__. A flashing guide is available `here <https://primalcortex.wordpress.com/2017/06/13/building-a-black-magic-debug-probe/>`__. You then have to configure the target serial port ("GDB port") in your project per `documentation <https://docs.platformio.org/en/latest/plus/debug-tools/blackmagic.html#debugging-tool-blackmagic>`__.
 
-.. note::
-    For the pico-debug (`download <https://github.com/majbthrd/pico-debug/releases>`__) debugging way, *which needs no additional debug probe*, add this snippet to your ``platformio.ini`` and follow the given procedure:
-
-    .. code:: ini
-
-        upload_protocol = pico-debug
-        debug_tool = pico-debug
-        build_flags = -DPIO_FRAMEWORK_ARDUINO_NO_USB
-
-    1. Build your firmware normally
-    2. Plug in the Pico in BOOTSEL mode
-    3. Drag and drop your ``.pio/build/<env>/firmware.uf2`` onto the boot drive
-    4. Unplug and replug your Pico back into BOOTSEL mode for the second time
-    5. Drag and drop the downloaded ``pico-debug-gimmecache.uf2`` file onto the boot drive
-    6. A CMSIS-DAP device should now appear on your computer
-    7. Start debugging via the debug sidebar as normal
-
-    Note the restrictions: The second core cannot be used, the USB port cannot be used (no USB serial, only UART serial), 16KB less RAM is available.
-
 Filesystem Uploading
 --------------------