Documentation: msm-hsusb.txt: remove

Commit a170a1e9 ("usb: phy: remove phy-msm-usb.c") removed the
device driver but left the corresponding documentation, delete it.

Signed-off-by: Masanori Ogino <mogino@acm.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240816090105.13651-2-omasanori@proton.me


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>