qemu: Remove unnecessary label and its only reference

Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

src/qemu/qemu_domain.c

@@ -4217,7 +4217,6 @@ qemuDomainCheckDiskPresence(virQEMUDriverPtr driver,
                             virDomainObjPtr vm,
                             bool cold_boot)
 {
-    int ret = -1;
     size_t i;
 
     VIR_DEBUG("Checking for disk presence");
@@ -4244,13 +4243,10 @@ qemuDomainCheckDiskPresence(virQEMUDriverPtr driver,
         if (qemuDomainCheckDiskStartupPolicy(driver, vm, idx, cold_boot) >= 0)
             continue;
 
-        goto error;
+        return -1;
     }
 
-    ret = 0;
-
- error:
-    return ret;
+    return 0;
 }
 
 /*