Revert "Disable STDIN input to allow deepsleep"

[giulcioffi]

Commit ec9a6a3 was introduced to reduce power consumption, but it actually has no effect on low power. On the contrary, it was preventing a correct functionality on Nano 33 BLE UART pins when used as GPIOs.
Reverting this commit solves issue #230.

[github-actions]

Memory usage change @ 839f23a

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m4	💚 -64 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed:envie_m7	💚 -64 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed:nano33ble	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	libraries/Scheduler/examples/MultipleBlinks flash	%	libraries/Scheduler/examples/MultipleBlinks RAM for global variables	%	libraries/doom/examples/Doom flash	%	libraries/doom/examples/Doom RAM for global variables	%	libraries/KernelDebug/examples/KernelDebug flash	%	libraries/KernelDebug/examples/KernelDebug RAM for global variables	%	libraries/Portenta_SDCARD/examples/TestSDCARD flash	%	libraries/Portenta_SDCARD/examples/TestSDCARD RAM for global variables	%	libraries/Portenta_Video/examples/Envie_video_coreboot flash	%	libraries/Portenta_Video/examples/Envie_video_coreboot RAM for global variables	%	libraries/RPC/examples/RPC_m4 flash	%	libraries/RPC/examples/RPC_m4 RAM for global variables	%	libraries/RPC/examples/SerialPassthrough_RPC flash	%	libraries/RPC/examples/SerialPassthrough_RPC RAM for global variables	%	libraries/PDM/examples/PDMSerialPlotter flash	%	libraries/PDM/examples/PDMSerialPlotter RAM for global variables	%	libraries/Portenta_Camera/examples/CameraCaptureRawBytes flash	%	libraries/Portenta_Camera/examples/CameraCaptureRawBytes RAM for global variables	%	libraries/Portenta_Camera/examples/CameraMotionDetect flash	%	libraries/Portenta_Camera/examples/CameraMotionDetect RAM for global variables	%	libraries/Portenta_System/examples/PortentaH7_getBootloaderInfo flash	%	libraries/Portenta_System/examples/PortentaH7_getBootloaderInfo RAM for global variables	%	libraries/Portenta_System/examples/PortentaH7_updateBootloader flash	%	libraries/Portenta_System/examples/PortentaH7_updateBootloader RAM for global variables	%	libraries/ThreadDebug/examples/ThreadDebug flash	%	libraries/ThreadDebug/examples/ThreadDebug RAM for global variables	%	libraries/USBHOST/examples/KeyboardController flash	%	libraries/USBHOST/examples/KeyboardController RAM for global variables	%	libraries/USBHOST/examples/Shell flash	%	libraries/USBHOST/examples/Shell RAM for global variables	%	libraries/WiFi/examples/PortentaWiFiFirmwareUpdater flash	%	libraries/WiFi/examples/PortentaWiFiFirmwareUpdater RAM for global variables	%	libraries/WiFi/examples/WiFiWebClient flash	%	libraries/WiFi/examples/WiFiWebClient RAM for global variables	%
arduino:mbed:envie_m4	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	-64	-0.01	0	0.0	0	0.0	0	0.0	-64	-0.01	0	0.0	0	0.0	0	0.0
arduino:mbed:envie_m7	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	-64	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed:nano33ble	0	0.0	0	0.0																									0	0.0	0	0.0																	0	0.0	0	0.0

Click for full report CSV

Board,libraries/Scheduler/examples/MultipleBlinks<br>flash,%,libraries/Scheduler/examples/MultipleBlinks<br>RAM for global variables,%,libraries/doom/examples/Doom<br>flash,%,libraries/doom/examples/Doom<br>RAM for global variables,%,libraries/KernelDebug/examples/KernelDebug<br>flash,%,libraries/KernelDebug/examples/KernelDebug<br>RAM for global variables,%,libraries/Portenta_SDCARD/examples/TestSDCARD<br>flash,%,libraries/Portenta_SDCARD/examples/TestSDCARD<br>RAM for global variables,%,libraries/Portenta_Video/examples/Envie_video_coreboot<br>flash,%,libraries/Portenta_Video/examples/Envie_video_coreboot<br>RAM for global variables,%,libraries/RPC/examples/RPC_m4<br>flash,%,libraries/RPC/examples/RPC_m4<br>RAM for global variables,%,libraries/RPC/examples/SerialPassthrough_RPC<br>flash,%,libraries/RPC/examples/SerialPassthrough_RPC<br>RAM for global variables,%,libraries/PDM/examples/PDMSerialPlotter<br>flash,%,libraries/PDM/examples/PDMSerialPlotter<br>RAM for global variables,%,libraries/Portenta_Camera/examples/CameraCaptureRawBytes<br>flash,%,libraries/Portenta_Camera/examples/CameraCaptureRawBytes<br>RAM for global variables,%,libraries/Portenta_Camera/examples/CameraMotionDetect<br>flash,%,libraries/Portenta_Camera/examples/CameraMotionDetect<br>RAM for global variables,%,libraries/Portenta_System/examples/PortentaH7_getBootloaderInfo<br>flash,%,libraries/Portenta_System/examples/PortentaH7_getBootloaderInfo<br>RAM for global variables,%,libraries/Portenta_System/examples/PortentaH7_updateBootloader<br>flash,%,libraries/Portenta_System/examples/PortentaH7_updateBootloader<br>RAM for global variables,%,libraries/ThreadDebug/examples/ThreadDebug<br>flash,%,libraries/ThreadDebug/examples/ThreadDebug<br>RAM for global variables,%,libraries/USBHOST/examples/KeyboardController<br>flash,%,libraries/USBHOST/examples/KeyboardController<br>RAM for global variables,%,libraries/USBHOST/examples/Shell<br>flash,%,libraries/USBHOST/examples/Shell<br>RAM for global variables,%,libraries/WiFi/examples/PortentaWiFiFirmwareUpdater<br>flash,%,libraries/WiFi/examples/PortentaWiFiFirmwareUpdater<br>RAM for global variables,%,libraries/WiFi/examples/WiFiWebClient<br>flash,%,libraries/WiFi/examples/WiFiWebClient<br>RAM for global variables,%
arduino:mbed:envie_m4,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,-64,-0.01,0,0.0,0,0.0,0,0.0,-64,-0.01,0,0.0,0,0.0,0,0.0
arduino:mbed:envie_m7,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,-64,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed:nano33ble,0,0.0,0,0.0,,,,,,,,,,,,,,,,,,,,,,,,,0,0.0,0,0.0,,,,,,,,,,,,,,,,,0,0.0,0,0.0,,,,,,,,,,,,,,,,