fix(dorm): 班主任床位分配页去掉退宿选中床位按钮

避免老师误点退宿，页面仅保留分配、收回与调宿操作。

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/views/xg/xgss/bzrfp/bzrfp.vue

@@ -99,7 +99,6 @@
                   <!-- <el-button type="success" icon="UserFilled" size="small" @click="handleRandomAllocation">随机分配</el-button>
                   <el-button type="info" icon="Sort" size="small" @click="handleStudentNoAllocation">按学号分配</el-button> -->
                   <el-button type="warning" icon="RefreshLeft" size="small" @click="handleRecallBeds">收回选中床位</el-button>
-                  <el-button type="danger" icon="House" size="small" @click="handleStayawayBeds">退宿选中床位</el-button>
                   <el-button type="info" icon="Switch" size="small" @click="handleBedTransfer">调宿</el-button>
                 </el-col>
                 <el-col :span="12" style="text-align: right">