bricks/ev3dev: remove PBYRICKS_PORT_BUILTINS

This was misspelled, but since it wasn't doing anything we can just
remove it instead of fixing the spelling.

Author: dlech

bricks/ev3dev/brickconfig.h

@@ -44,5 +44,3 @@ extern const struct _mp_obj_module_t pb_module_usignal;
     { MP_ROM_QSTR(MP_QSTR_bluetooth_c),     MP_ROM_PTR(&pb_module_bluetooth)        }, \
     { MP_ROM_QSTR(MP_QSTR_media_ev3dev_c),  MP_ROM_PTR(&pb_module_media_ev3dev)     }, \
     { MP_ROM_QSTR(MP_QSTR_usignal),         MP_ROM_PTR(&pb_module_usignal)          },
-
-#define PBYRICKS_PORT_BUILTINS

bricks/ev3dev/mpconfigport.h

@@ -373,7 +373,6 @@ void mp_unix_mark_exec(void);
 #endif
 
 #define MICROPY_PORT_BUILTINS \
-    PBYRICKS_PORT_BUILTINS \
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
 #define MP_STATE_PORT MP_STATE_VM