fix: 解决页面横向滚动条不显示问题 (#190)

Co-authored-by: Qingxuan001 <534794892@qqcom>

src/style/sidebar.scss

@@ -23,16 +23,6 @@
     margin-left: $sideBarWidth;
     position: relative;
     background: #f0f2f5;
-    @media screen and (min-width: 150px) and (max-width: 420px) {
-      .app-main .el-scrollbar__view:first-child {
-        overflow-y: hidden;
-      }
-    }
-    @media screen and (min-width: 420px) {
-      .app-main .el-scrollbar__view:first-child {
-        overflow: hidden;
-      }
-    }
   }
 
   .fixed-header {