boards/esp32c3-xiao: Fix ble configuration crash

[linguini1]

Summary

Removes CXX initialization from the 'ble' configuration, preventing it from crashing at boot time.

Closes #17873.

Impact

Configuration now works properly.

Testing

After this change, the board boots normally into the ble configuration and can
scan for devices.

(NSH) NuttX-12.12.0
nsh> 
nsh> 
nsh> help
help usage:  help [-v] [<cmd>]

    .           cp          false       ls          rm          umount      
    [           cmp         fdinfo      mkdir       rmdir       unset       
    ?           dirname     free        mkrd        set         uptime      
    alias       df          help        mount       sleep       usleep      
    unalias     dmesg       hexdump     mv          source      watch       
    arp         echo        ifconfig    pidof       test        xd          
    basename    env         ifdown      printf      time        wait        
    break       exec        ifup        ps          true                                                                                                      
    cat         exit        kill        pwd         truncate                                                                                                  
    cd          expr        pkill       reboot      uname                                                                                                     
                                                                                                                                                              
Builtin Apps:                                                                                                                                                 
    bt           dumpstack    nsh          sh                                                                                                                 
    dd           getprime     ostest                   
nsh> ifconfig                                                                                                                                                 
bnep0   Link encap:UNSPEC at DOWN mtu -9                                                                                                                      
        inet addr:0.0.0.0 DRaddr:0.0.0.0 Mask:0.0.0.0