cc3200: Remove Timer.AB constant.

Timer.A and Timer.B can be ORed for this purpose.

cc3200/mods/pybtimer.c

@@ -510,7 +510,6 @@ STATIC const mp_map_elem_t pyb_timer_locals_dict_table[] = {
     // class constants
     { MP_OBJ_NEW_QSTR(MP_QSTR_A),                       MP_OBJ_NEW_SMALL_INT(TIMER_A) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_B),                       MP_OBJ_NEW_SMALL_INT(TIMER_B) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_AB),                      MP_OBJ_NEW_SMALL_INT(TIMER_A | TIMER_B) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_ONE_SHOT),                MP_OBJ_NEW_SMALL_INT(TIMER_CFG_A_ONE_SHOT) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_PERIODIC),                MP_OBJ_NEW_SMALL_INT(TIMER_CFG_A_PERIODIC) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_EDGE_COUNT),              MP_OBJ_NEW_SMALL_INT(TIMER_CFG_A_CAP_COUNT) },

cc3200/qstrdefsport.h

@@ -348,7 +348,6 @@ Q(event_count)
 Q(event_time)
 Q(A)
 Q(B)
-Q(AB)
 Q(ONE_SHOT)
 Q(PERIODIC)
 Q(EDGE_COUNT)