ARM: defconfig: pxa: cut MPU3050 input driver

The PXA defconfig compiles the legacy MPU3050 driver as a module,
but the device does not appear in device trees nor board files, so
remove this from the defconfig assuming it was a mistake to add it
in the first place.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/configs/pxa_defconfig

@@ -334,7 +334,6 @@ CONFIG_TOUCHSCREEN_TOUCHIT213=m
 CONFIG_TOUCHSCREEN_PCAP=m
 CONFIG_TOUCHSCREEN_ST1232=m
 CONFIG_INPUT_MISC=y
-CONFIG_INPUT_MPU3050=m
 CONFIG_INPUT_AXP20X_PEK=m
 CONFIG_INPUT_UINPUT=m
 CONFIG_INPUT_GPIO_ROTARY_ENCODER=m