ANDROID: drop CONFIG_INPUT_KEYCHORD from cuttlefish

Remove keychord driver, replaced in user space by
https://android-review.googlesource.com/c/677629

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Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 129556081
Change-Id: Ie8a2b9977a21022c204a19f1a8d781ea5a23c656