conf: Improve error handling in virDomainChrDefFormat()

We don't need to store the return value since we never modify it.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>

src/conf/domain_conf.c

@@ -24037,8 +24037,6 @@ virDomainChrDefFormat(virBufferPtr buf,
     const char *elementName = virDomainChrDeviceTypeToString(def->deviceType);
     bool tty_compat;
 
-    int ret = 0;
-
     if (!elementName) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("unexpected char device type %d"),
@@ -24066,7 +24064,7 @@ virDomainChrDefFormat(virBufferPtr buf,
     virBufferAdjustIndent(buf, -2);
     virBufferAsprintf(buf, "</%s>\n", elementName);
 
-    return ret;
+    return 0;
 }
 
 static int