fix: 删除重复环境变量ElUploadInstance

Signed-off-by: 棉花 <12559203+radish-hi_0@user.noreply.gitee.com>

src/types/element.d.ts

@@ -24,7 +24,6 @@ declare global {
   declare type ElColorPickerInstance = InstanceType<typeof ep.ElColorPicker>;
   declare type ElRateInstance = InstanceType<typeof ep.ElRate>;
   declare type ElSliderInstance = InstanceType<typeof ep.ElSlider>;
-  declare type ElUploadInstance = InstanceType<typeof ep.ElUpload>;
   declare type ElScrollbarInstance = InstanceType<typeof ep.ElScrollbar>;
 
   declare type TransferKey = ep.TransferKey;