Fix pinout so it "works" on non-pi platforms

Or doesn't fail in such a brutal manner, anyway...

gpiozero/cli/pinout.py

@@ -1,67 +0,0 @@
-#!/usr/bin/env python
-"""
-pinout - gpiozero command-line pinout tool.
-
-Output Raspberry Pi GPIO pinout information.
-"""
-
-from __future__ import unicode_literals, absolute_import, print_function, division
-
-import argparse
-import sys
-
-from gpiozero import pi_info
-
-
-class PinoutTool(object):
-    def __init__(self):
-        self.parser = argparse.ArgumentParser(
-            description=__doc__
-        )
-        self.parser.add_argument(
-            '-r', '--revision',
-            dest='revision',
-            default='',
-            help='RPi revision. Default is to autodetect revision of current device'
-        )
-        self.parser.add_argument(
-            '-c', '--color',
-            action="store_true",
-            default=None,
-            help='Force colored output (by default, the output will include ANSI'
-            'color codes if run in a color-capable terminal). See also --monochrome'
-        )
-        self.parser.add_argument(
-            '-m', '--monochrome',
-            dest='color',
-            action='store_false',
-            help='Force monochrome output. See also --color'
-        )
-
-    def __call__(self, args=None):
-        if args is None:
-            args = sys.argv[1:]
-        try:
-            return self.main(self.parser.parse_args(args)) or 0
-        except argparse.ArgumentError as e:
-            # argparse errors are already nicely formatted, print to stderr and
-            # exit with code 2
-            raise e
-        except Exception as e:
-            # Output anything else nicely formatted on stderr and exit code 1
-            self.parser.exit(1, '{prog}: error: {message}\n'.format(
-                prog=self.parser.prog, message=e))
-
-    def main(self, args):
-        if args.revision == '':
-            try:
-                pi_info().pprint(color=args.color)
-            except IOError:
-                raise IOError('This device is not a Raspberry Pi')
-        else:
-            pi_info(args.revision).pprint(color=args.color)
-        print('')
-        print('For further information, please refer to https://pinout.xyz/')
-
-
-main = PinoutTool()