samples: drivers: can: increase the maximum number of shell arguments

Remove the custom Kconfig value for CONFIG_SHELL_ARGC_MAX as it is too low
to account for the new arguments to the "can send" shell command.

The default for CONFIG_SHELL_ARGC_MAX was increased to 20 in
32ebeb0 which is sufficient for sending
non-CAN-FD format frames using the new "can send" shell command.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

samples/drivers/can/prj.conf

@@ -6,7 +6,6 @@ CONFIG_CAN_MAX_FILTER=5
 CONFIG_SHELL=y
 CONFIG_CAN_SHELL=y
 CONFIG_DEVICE_SHELL=y
-CONFIG_SHELL_ARGC_MAX=13
 
 CONFIG_GPIO=y
 CONFIG_STATS=y