优化代码 将空‘catch’块形参重命名为‘ignored’

Signed-off-by: 梁剑锋 <1822213252@qq.com>

ruoyi-admin/src/main/java/com/ruoyi/web/controller/monitor/SysUserOnlineController.java

@@ -83,7 +83,7 @@ public class SysUserOnlineController extends BaseController {
     public R<Void> forceLogout(@PathVariable String tokenId) {
         try {
             StpUtil.kickoutByTokenValue(tokenId);
-        } catch (NotLoginException e) {
+        } catch (NotLoginException ignored) {
         }
         return R.ok();
     }