boards/snekboard: Delete SPI object reference

Snekboard does not expose any pins for SPI to the user, so delete
the SPI object reference as that won't work.

Signed-off-by: Keith Packard <keithp@keithp.com>

ports/atmel-samd/boards/snekboard/mpconfigboard.h

@@ -27,10 +27,6 @@
 #define DEFAULT_I2C_BUS_SCL (&pin_PA08)	/* ANALOG 5 */
 #define DEFAULT_I2C_BUS_SDA (&pin_PA09)	/* ANALOG 6 */
 
-//#define DEFAULT_SPI_BUS_SCK (&pin_PB11)
-//#define DEFAULT_SPI_BUS_MOSI (&pin_PB10)
-//#define DEFAULT_SPI_BUS_MISO (&pin_PA12)
-
 #define DEFAULT_UART_BUS_RX (&pin_PB08)	/* ANALOG 1 */
 #define DEFAULT_UART_BUS_TX (&pin_PB09)	/* ANALOG 2 */
 

ports/atmel-samd/boards/snekboard/pins.c

@@ -23,7 +23,6 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_DIR4), MP_ROM_PTR(&pin_PA21) },
     { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_PB11) },
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
-    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
     { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);