examples/pins.py: Remove this pins printing example.

It's not supported on all ports, adds complexity to the build to generate
pins_af.py, and can mostly be replicated just by printing the pin objects.

Remove support for generating pins_af.py from all ports (nrf, stm32,
renesas-ra, mimxrt, rp2).

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

examples/pins.py

@@ -1,60 +0,0 @@
-# Print a nice list of pins, their current settings, and available afs.
-# Requires pins_af.py from ports/stm32/build-PYBV10/ directory.
-
-import pyb
-import pins_af
-
-
-def af():
-    max_name_width = 0
-    max_af_width = 0
-    for pin_entry in pins_af.PINS_AF:
-        max_name_width = max(max_name_width, len(pin_entry[0]))
-        for af_entry in pin_entry[1:]:
-            max_af_width = max(max_af_width, len(af_entry[1]))
-    for pin_entry in pins_af.PINS_AF:
-        pin_name = pin_entry[0]
-        print("%-*s " % (max_name_width, pin_name), end="")
-        for af_entry in pin_entry[1:]:
-            print("%2d: %-*s " % (af_entry[0], max_af_width, af_entry[1]), end="")
-        print("")
-
-
-def pins():
-    mode_str = {
-        pyb.Pin.IN: "IN",
-        pyb.Pin.OUT_PP: "OUT_PP",
-        pyb.Pin.OUT_OD: "OUT_OD",
-        pyb.Pin.AF_PP: "AF_PP",
-        pyb.Pin.AF_OD: "AF_OD",
-        pyb.Pin.ANALOG: "ANALOG",
-    }
-    pull_str = {pyb.Pin.PULL_NONE: "", pyb.Pin.PULL_UP: "PULL_UP", pyb.Pin.PULL_DOWN: "PULL_DOWN"}
-    width = [0, 0, 0, 0]
-    rows = []
-    for pin_entry in pins_af.PINS_AF:
-        row = []
-        pin_name = pin_entry[0]
-        pin = pyb.Pin(pin_name)
-        pin_mode = pin.mode()
-        row.append(pin_name)
-        row.append(mode_str[pin_mode])
-        row.append(pull_str[pin.pull()])
-        if pin_mode == pyb.Pin.AF_PP or pin_mode == pyb.Pin.AF_OD:
-            pin_af = pin.af()
-            for af_entry in pin_entry[1:]:
-                if pin_af == af_entry[0]:
-                    af_str = "%d: %s" % (pin_af, af_entry[1])
-                    break
-            else:
-                af_str = "%d" % pin_af
-        else:
-            af_str = ""
-        row.append(af_str)
-        for col in range(len(width)):
-            width[col] = max(width[col], len(row[col]))
-        rows.append(row)
-    for row in rows:
-        for col in range(len(width)):
-            print("%-*s " % (width[col], row[col]), end="")
-        print("")