Remove configurations using canutils/libuavcan and examples/uavcan. libuavcan...

Remove configurations using canutils/libuavcan and examples/uavcan.  libuavcan has not built for a year or so.  The basic problem is that as NuttX advances, the old frozen versino of libuavcan has become absolute because it violates the portable POSIX OS interface.  No one is maintaining the port so there is no alternative but to remove it.

configs/nucleo-f303re/src/stm32_boot.c

@@ -86,11 +86,6 @@ void stm32_boardinitialize(void)
     }
 #endif
 
-#ifdef CONFIG_CANUTILS_LIBUAVCAN
-  (void)stm32_configgpio(GPIO_CAN1_RX);
-  (void)stm32_configgpio(GPIO_CAN1_TX);
-#endif
-
   /* Configure on-board LEDs if LED support has been selected. */
 
 #ifdef CONFIG_ARCH_LEDS

configs/nucleo-f303re/uavcan/defconfig

-# CONFIG_ARCH_FPU is not set
-# CONFIG_DEV_CONSOLE is not set
-# CONFIG_SERIAL is not set
-CONFIG_ARCH_BOARD_NUCLEO_F303RE=y
-CONFIG_ARCH_BOARD="nucleo-f303re"
-CONFIG_ARCH_BUTTONS=y
-CONFIG_ARCH_CHIP_STM32=y
-CONFIG_ARCH_CHIP_STM32F303RE=y
-CONFIG_ARCH_STACKDUMP=y
-CONFIG_ARCH="arm"
-CONFIG_BOARD_LOOPSPERMSEC=6522
-CONFIG_C99_BOOL8=y
-CONFIG_CANUTILS_LIBUAVCAN=y
-CONFIG_EXAMPLES_UAVCAN=y
-CONFIG_HAVE_CXX=y
-CONFIG_HAVE_CXXINITIALIZE=y
-CONFIG_IDLETHREAD_STACKSIZE=2048
-CONFIG_INTELHEX_BINARY=y
-CONFIG_LIBM=y
-CONFIG_MAX_TASKS=16
-CONFIG_MAX_WDOGPARMS=2
-CONFIG_MM_REGIONS=2
-CONFIG_NFILE_DESCRIPTORS=8
-CONFIG_NFILE_STREAMS=8
-CONFIG_PREALLOC_MQ_MSGS=4
-CONFIG_PREALLOC_TIMERS=4
-CONFIG_PREALLOC_WDOGS=8
-CONFIG_RAM_SIZE=65536
-CONFIG_RAM_START=0x20000000
-CONFIG_RAW_BINARY=y
-CONFIG_RR_INTERVAL=200
-CONFIG_SCHED_WAITPID=y
-CONFIG_SDCLONE_DISABLE=y
-CONFIG_START_DAY=27
-CONFIG_START_YEAR=2013
-CONFIG_STM32_JTAG_SW_ENABLE=y
-CONFIG_TASK_NAME_SIZE=0
-CONFIG_USER_ENTRYPOINT="uavcan_main"
-CONFIG_WDOG_INTRESERVE=1

configs/stm32f4discovery/src/stm32_boot.c

@@ -99,15 +99,6 @@ void stm32_boardinitialize(void)
     }
 #endif
 
-#ifdef CONFIG_CANUTILS_LIBUAVCAN
-  (void)stm32_configgpio(GPIO_CAN1_RX);
-  (void)stm32_configgpio(GPIO_CAN1_TX);
-#  if CONFIG_LIBUAVCAN_STM32_NUM_IFACES > 1
-  (void)stm32_configgpio(GPIO_CAN2_RX);
-  (void)stm32_configgpio(GPIO_CAN2_TX);
-#  endif
-#endif
-
 #ifdef CONFIG_ARCH_LEDS
   /* Configure on-board LEDs if LED support has been selected. */
 

configs/stm32f4discovery/uavcan/defconfig

-# CONFIG_ARCH_FPU is not set
-# CONFIG_DEV_CONSOLE is not set
-# CONFIG_SERIAL is not set
-CONFIG_ARCH_BOARD_STM32F4_DISCOVERY=y
-CONFIG_ARCH_BOARD="stm32f4discovery"
-CONFIG_ARCH_BUTTONS=y
-CONFIG_ARCH_CHIP_STM32=y
-CONFIG_ARCH_CHIP_STM32F407VG=y
-CONFIG_ARCH_STACKDUMP=y
-CONFIG_ARCH="arm"
-CONFIG_BOARD_LOOPSPERMSEC=16717
-CONFIG_C99_BOOL8=y
-CONFIG_CANUTILS_LIBUAVCAN=y
-CONFIG_EXAMPLES_UAVCAN=y
-CONFIG_HAVE_CXX=y
-CONFIG_HAVE_CXXINITIALIZE=y
-CONFIG_INTELHEX_BINARY=y
-CONFIG_LIBM=y
-CONFIG_MAX_TASKS=16
-CONFIG_MAX_WDOGPARMS=2
-CONFIG_MM_REGIONS=2
-CONFIG_NFILE_DESCRIPTORS=8
-CONFIG_NFILE_STREAMS=8
-CONFIG_PREALLOC_MQ_MSGS=4
-CONFIG_PREALLOC_TIMERS=4
-CONFIG_PREALLOC_WDOGS=4
-CONFIG_RAM_SIZE=114688
-CONFIG_RAM_START=0x20000000
-CONFIG_RAMLOG_SYSLOG=y
-CONFIG_RAMLOG=y
-CONFIG_RAW_BINARY=y
-CONFIG_RR_INTERVAL=200
-CONFIG_SCHED_WAITPID=y
-CONFIG_SDCLONE_DISABLE=y
-CONFIG_START_DAY=6
-CONFIG_START_MONTH=12
-CONFIG_START_YEAR=2011
-CONFIG_STM32_JTAG_SW_ENABLE=y
-CONFIG_USER_ENTRYPOINT="uavcan_main"
-CONFIG_WDOG_INTRESERVE=0