ANDROID: goldfish: drop CONFIG_INPUT_KEYCHORD

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

.

Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Cc: Jin Qian <jinqian@google.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Bug: 64114943
Change-Id: I0b673a5c68dbe28afa033d2ca70e12daea144b2a