refactor(hero): 移除无用的英雄操作按钮与相关样式

1. 从App.vue中删除英雄列表的修改和删除操作按钮
2. 移除全局和移动端适配下的.row-actions相关样式代码
3. 清理heroes.json中多余的技能配置字段

put/web/src/App.vue

@@ -46,10 +46,6 @@
             <span v-if="bonusCount(h)" class="trigger-chip">加成: ×{{ bonusCount(h) }}</span>
           </div>
           <div class="row-comment" v-if="h.comment || h.info">{{ h.comment || h.info }}</div>
-          <div class="row-actions" @click.stop>
-            <el-button size="small" type="primary" @click="openEdit(i)">修改</el-button>
-            <el-button size="small" type="danger" plain @click="removeHero(i)">删除</el-button>
-          </div>
         </div>
       </section>