migration: Remove transferred atomic counter

After last commit, it is a write only variable.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231025091117.6342-12-quintela@redhat.com>

migration/migration-stats.h

@@ -97,10 +97,6 @@ typedef struct {
      * Number of bytes sent through RDMA.
      */
     Stat64 rdma_bytes;
-    /*
-     * Total number of bytes transferred.
-     */
-    Stat64 transferred;
     /*
      * Number of pages transferred that were full of zeros.
      */

migration/multifd.c

@@ -188,7 +188,6 @@ static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp)
         return -1;
     }
     stat64_add(&mig_stats.multifd_bytes, size);
-    stat64_add(&mig_stats.transferred, size);
     return 0;
 }
 
@@ -733,8 +732,6 @@ static void *multifd_send_thread(void *opaque)
 
             stat64_add(&mig_stats.multifd_bytes,
                        p->next_packet_size + p->packet_len);
-            stat64_add(&mig_stats.transferred,
-                       p->next_packet_size + p->packet_len);
             p->next_packet_size = 0;
             qemu_mutex_lock(&p->mutex);
             p->pending_job--;

migration/ram.c

@@ -448,7 +448,6 @@ void ram_transferred_add(uint64_t bytes)
     } else {
         stat64_add(&mig_stats.downtime_bytes, bytes);
     }
-    stat64_add(&mig_stats.transferred, bytes);
 }
 
 struct MigrationOps {