We only support COLO with the same version on both sides so this is
not needed anymore.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
---
 migration/migration.c  | 5 -----
 migration/savevm.c     | 8 +-------
 migration/savevm.h     | 1 -
 migration/trace-events | 1 -
 4 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/migration/migration.c b/migration/migration.c
index 3f3fc5276bb067ae1960e4b675b33208ad641b23..5515be1bf305b40ba0b590136df18a53451872c5 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -3496,11 +3496,6 @@ static void *migration_thread(void *opaque)
         qemu_savevm_send_postcopy_advise(s->to_dst_file);
     }
 
-    if (migrate_colo()) {
-        /* Notify migration destination that we enable COLO */
-        qemu_savevm_send_colo_enable(s->to_dst_file);
-    }
-
     if (migrate_auto_converge()) {
         /* Start RAMBlock dirty bitmap sync timer */
         cpu_throttle_dirty_sync_timer(true);
diff --git a/migration/savevm.c b/migration/savevm.c
index 413688b75f4bee6cb10878eb51886cf6ba14872d..a3af09616a7bd22194ffba3cfb7cc4cf15fc88e0 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -90,7 +90,7 @@ enum qemu_vm_cmd {
                                       were previously sent during
                                       precopy but are dirty. */
     MIG_CMD_PACKAGED,          /* Send a wrapped stream within this stream */
-    MIG_CMD_ENABLE_COLO,       /* Enable COLO */
+    MIG_CMD_UNUSED_0,          /* Unused since 11.0 */
     MIG_CMD_POSTCOPY_RESUME,   /* resume postcopy on dest */
     MIG_CMD_RECV_BITMAP,       /* Request for recved bitmap on dst */
     MIG_CMD_SWITCHOVER_START,  /* Switchover start notification */
@@ -1092,12 +1092,6 @@ static void qemu_savevm_command_send(QEMUFile *f,
     qemu_fflush(f);
 }
 
-void qemu_savevm_send_colo_enable(QEMUFile *f)
-{
-    trace_savevm_send_colo_enable();
-    qemu_savevm_command_send(f, MIG_CMD_ENABLE_COLO, 0, NULL);
-}
-
 void qemu_savevm_send_ping(QEMUFile *f, uint32_t value)
 {
     uint32_t buf;
diff --git a/migration/savevm.h b/migration/savevm.h
index 125a2507b7279412bcb0745b95a774874c31c54f..0a1e5bfd1ca125565a4c90c6f31b2f8c94404117 100644
--- a/migration/savevm.h
+++ b/migration/savevm.h
@@ -62,7 +62,6 @@ void qemu_savevm_send_postcopy_ram_discard(QEMUFile *f, const char *name,
                                            uint16_t len,
                                            uint64_t *start_list,
                                            uint64_t *length_list);
-void qemu_savevm_send_colo_enable(QEMUFile *f);
 void qemu_savevm_live_state(QEMUFile *f);
 int qemu_save_device_state(QEMUFile *f);
 
diff --git a/migration/trace-events b/migration/trace-events
index 91d7506634c9f110e8f0b5f9183728058fe6542a..cfd4d58a0f82ec299ca9e8a9260dd3c3a210cece 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -37,7 +37,6 @@ savevm_send_ping(uint32_t val) "0x%x"
 savevm_send_postcopy_listen(void) ""
 savevm_send_postcopy_run(void) ""
 savevm_send_postcopy_resume(void) ""
-savevm_send_colo_enable(void) ""
 savevm_send_recv_bitmap(char *name) "%s"
 savevm_send_switchover_start(void) ""
 savevm_state_setup(void) ""

-- 
2.39.5