updated README.md

code cleanup

frontend/src/styles/element-ui 2.scss

@@ -1,30 +0,0 @@
-//to reset element-ui default css
-.el-upload {
-  input[type="file"] {
-    display: none !important;
-  }
-}
-
-.el-upload__input {
-  display: none;
-}
-
-//暂时性解决diolag 问题 https://github.com/ElemeFE/element/issues/2461
-.el-dialog {
-  transform: none;
-  left: 0;
-  position: relative;
-  margin: 0 auto;
-}
-
-//element ui upload
-.upload-container {
-  .el-upload {
-    width: 100%;
-
-    .el-upload-dragger {
-      width: 100%;
-      height: 200px;
-    }
-  }
-}