修复一个无法删除更新包的问题

app/src/main/java/com/bgycc/smartcanteen/command/UpdateCommandWorker.java

@@ -66,11 +66,10 @@ public class UpdateCommandWorker extends CommandWorker {
                     && info.getPackageName().equals(BuildConfig.APPLICATION_ID)
                     && info.getVersionCode() == BuildConfig.VERSION_CODE) {
                 LogUtils.d(TAG, "版本" + info.getVersionCode() + "已安装完毕");
-                updateApk.deleteOnExit();
+                FileUtils.delete(updateApk);
                 return success("已是最新版本");
             }
         }
-        updateApk.deleteOnExit();
 
         String url = commandUpdate.getData().getUrl();
         Request request = new Request.Builder()