Remove personal CDN override hacks

These CDN compatibility hacks are personal deployment adjustments and should not live in the public codebase.

Keep them in a separate personal branch when needed, while preserving only the generic 99_0_115.zip probe-and-append behavior in the shared branch.

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/handler/download/geturl.go

@@ -23,15 +23,10 @@ func getUrl(ctx *gin.Context) {
 		return
 	}
 
-	cdnServer := config.Conf.Settings.BackupCdnServer
-	if cdnServer == "" {
-		cdnServer = config.Conf.Settings.CdnServer
-	}
-
 	urlList := []string{}
 	for _, v := range downloadReq.PathList {
 		urlList = append(urlList, fmt.Sprintf("%s/%s/extracted/%s",
-			cdnServer, downloadReq.Os, strings.ReplaceAll(v, "\\", "")))
+			config.Conf.Settings.CdnServer, downloadReq.Os, strings.ReplaceAll(v, "\\", "")))
 	}
 
 	ss.Respond(downloadschema.UrlResp{