refactor(hr): 移除岗位信息排除键值实体常量

- 删除了 NCKD_POSITION_EXCLUDEKEY_ENTITY 常量定义
- 清理了相关注释文档

code/hrmp/nckd-jxccl-hrmp/src/main/java/nckd/jxccl/hrmp/hbpm/common/hr/PositionBillConstant.java

@@ -23,8 +23,6 @@ public class PositionBillConstant extends FormConstant {
     public static final String NCKD_POSBILLENTRYCHANGE_ENTITY = "nckd_posbillentrychange";
     /** 岗位申请分录键值转换实体标识 */
     public static final String NCKD_PBENTRY_TRANSKEY_ENTITY = "nckd_pbentry_transkey";
-    /** 岗位信息排除键值实体标识 */
-    public static final String NCKD_POSITION_EXCLUDEKEY_ENTITY = "nckd_position_excludekey";
     /** 岗位管理_应用首页实体标识 */
     public static final String NCKD_POSTMGR_APPHOME_ENTITY = "nckd_postmgr_apphome";