renesas-ra/mpconfigport: Drop pyb_hid_report_desc root pointer.

pyb_hid_report_desc is not used anywhere in the renesas-ra port (probably
was copied from stm32 port).

Signed-off-by: David Lechner <david@pybricks.com>

ports/renesas-ra/mpconfigport.h

@@ -168,8 +168,6 @@
 #endif
 
 #define MICROPY_PORT_ROOT_POINTERS \
-    mp_obj_t pyb_hid_report_desc; \
-    \
     mp_obj_t pyb_config_main; \
     \
     mp_obj_t pyb_switch_callback; \