refactor(equipList2): remove redundant assignment of pur_id

移除了equipList2页面中多余的pur_id赋值代码，清理无用逻辑

pages/equipList2/index.vue

@@ -323,7 +323,6 @@
 			historys(item) {
 				const type_id = item.type_id;
 				this.accessToken = uni.getStorageSync('session_key')
-				item.pur_id = this.pur_id;
 				switch (type_id) {
 					// 水肥新设备
 					case 22: