Remove old RA process(es) when removing UE

In handover, we might need to remove a UE that we knew under it's
C-RNTI, for which we also have the RA process. Hence, when removing a UE
by RNTI, remove it also from RA.

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -2675,6 +2675,16 @@ void mac_remove_nr_ue(gNB_MAC_INST *nr_mac, rnti_t rnti)
   memcpy(UE_info->list, newUEs, sizeof(UE_info->list));
   NR_SCHED_UNLOCK(&UE_info->mutex);
 
+  const int CC_id = 0;
+  NR_COMMON_channels_t *cc = &nr_mac->common_channels[CC_id];
+  for (int i = 0; i < NR_NB_RA_PROC_MAX; i++) {
+    NR_RA_t *ra = &cc->ra[i];
+    if (ra->rnti == UE->rnti) {
+      nr_clear_ra_proc(ra);
+      ra->cfra = 0;
+    }
+  }
+
   delete_nr_ue_data(UE, nr_mac->common_channels, &UE_info->uid_allocator);
 }