refactor: 精简代码

Author: ArgoZhang

src/BootstrapBlazor/Components/Upload/UploadPreviewList.razor.cs

@@ -217,21 +217,6 @@ protected override void OnParametersSet()
         LoadingIcon ??= IconTheme.GetIconByKey(ComponentIcons.UploadLoadingIcon);
         InvalidStatusIcon ??= IconTheme.GetIconByKey(ComponentIcons.UploadInvalidStatusIcon);
         ValidStatusIcon ??= IconTheme.GetIconByKey(ComponentIcons.UploadValidStatusIcon);
-        DownloadIcon ??= IconTheme.GetIconByKey(ComponentIcons.UploadDownloadIcon);
-        CancelIcon ??= IconTheme.GetIconByKey(ComponentIcons.UploadCancelIcon);
-        DeleteIcon ??= IconTheme.GetIconByKey(ComponentIcons.UploadDeleteIcon);
-
-        FileIconExcel ??= IconTheme.GetIconByKey(ComponentIcons.FileIconExcel);
-        FileIconDocx ??= IconTheme.GetIconByKey(ComponentIcons.FileIconDocx);
-        FileIconPPT ??= IconTheme.GetIconByKey(ComponentIcons.FileIconPPT);
-        FileIconAudio ??= IconTheme.GetIconByKey(ComponentIcons.FileIconAudio);
-        FileIconVideo ??= IconTheme.GetIconByKey(ComponentIcons.FileIconVideo);
-        FileIconCode ??= IconTheme.GetIconByKey(ComponentIcons.FileIconCode);
-        FileIconPdf ??= IconTheme.GetIconByKey(ComponentIcons.FileIconPdf);
-        FileIconZip ??= IconTheme.GetIconByKey(ComponentIcons.FileIconZip);
-        FileIconArchive ??= IconTheme.GetIconByKey(ComponentIcons.FileIconArchive);
-        FileIconImage ??= IconTheme.GetIconByKey(ComponentIcons.FileIconImage);
-        FileIconFile ??= IconTheme.GetIconByKey(ComponentIcons.FileIconFile);
     }
 
     private async Task OnClickDownload(UploadFile item)