ram: Remove colo special-casing

We only enter colo state after the precopy migration is finished
so this if is always taken.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Link: https://lore.kernel.org/qemu-devel/20260302-colo_unit_test_multifd-v11-6-d653fb3b1d80@web.de
Signed-off-by: Fabiano Rosas <farosas@suse.de>

migration/ram.c

@@ -3116,12 +3116,12 @@ static int ram_save_setup(QEMUFile *f, void *opaque, Error **errp)
     RAMBlock *block;
     int ret, max_hg_page_size;
 
-    /* migration has already setup the bitmap, reuse it. */
-    if (!migration_in_colo_state()) {
-        if (ram_init_all(rsp, errp) != 0) {
-            return -1;
-        }
+    assert(!migration_in_colo_state());
+
+    if (ram_init_all(rsp, errp) != 0) {
+        return -1;
     }
+
     (*rsp)->pss[RAM_CHANNEL_PRECOPY].pss_channel = f;
 
     /*