修复定时任务无法删除参数问题

ruoyi-quartz/src/main/resources/mapper/quartz/SysJobMapper.xml

@@ -66,7 +66,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  			<if test="jobName != null and jobName != ''">job_name = #{jobName},</if>
  			<if test="jobGroup != null and jobGroup != ''">job_group = #{jobGroup},</if>
  			<if test="methodName != null and methodName != ''">method_name = #{methodName},</if>
- 			<if test="methodParams != null and methodParams != ''">method_params = #{methodParams},</if>
+ 			method_params = #{methodParams},
  			<if test="cronExpression != null and cronExpression != ''">cron_expression = #{cronExpression},</if>
  			<if test="misfirePolicy != null and misfirePolicy != ''">misfire_policy = #{misfirePolicy},</if>
  			<if test="status !=null">status = #{status},</if>