Remove gamepad, gamepadshift

[jepler]

These are effectively replaced by the new keypad module (#4877)

@deshipu @ladyada

[dhalbert]

Currently keypad is turned off for all SAMD21 builds:

circuitpython/ports/atmel-samd/mpconfigport.mk

Line 53 in ae50809

CIRCUITPY_KEYPAD ?= 0

So we need to turn it back on for some or all, especially those boards that depend on gamepad or gamepadshift for most of their use (e.g. pewpew boards) but there may be space issues for larger languages.

[jepler]

I've fixed build errors and explicitly enabled keypad on:

• 8086_commander
• pewpew_m4
• ugame10

All other boards that HAD gamepad or gamepadshift seemed to already have keypad enabled.

[dhalbert]

All other boards that HAD gamepad or gamepadshift seemed to already have keypad enabled.

Before I added keypad, pretty much all the SAMD21 CIRCUITPY_FULL_BUILD boards had gamepad, i.e. there was something like:

CIRCUITPY_GAMEPAD ?= $(CIRCUITPY_FULL_BUILD)

I had to set that to 0 for all SAMD21 to get the builds to fit. So if possible it would be good to put keypad back in the CIRCUITPY_FULL_BUILD

[tannewt]

Please don't merge this until all examples and libraries have been updated.

[jepler]

I'll re-disable gamepad whereever it doesn't fit based on the above builds, and then wait for the signal that this can be merged.

[deshipu]

@jepler please don't disable gamepad on pewpew_m4 without first merging #4942 — the Stage library needs to be modified to use keypad.

[ladyada]

i reviewed & merged #4942

[dhalbert]

These libraries are still using gamepad or gamepadshift:

• adafruit-circuitplayground, were_pressed(), and in conf.py
• adafruit-pybadger
• adafruit-cursorcontrol
• adafruit-clue

Issues added to all these libraries.

[dhalbert]

I will update #5059 or open a new PR to include parts of this. gamepad and keypad together do not fit on some SAMD21 boards. But we'll leave gamepadshift in for 7.0.0 because it's harder to emulate, and not remove it until 8.0.0 after the libraries that use gamepadshift have been updated to use keypad.