fix：fix gitee delete haven't callback value

Author: hackycy

lib/views/manage_page/gitee_page/gitee_repo_page_presenter.dart

@@ -45,13 +45,14 @@ class GiteeRepoPagePresenter {
     }
   }
 
-  doDeleteContents(String path, String prePath, String name, String sha) async {
+  Future<bool> doDeleteContents(
+      String path, String prePath, String name, String sha) async {
     try {
       String configStr = await ImageUploadUtils.getPBConfig(PBTypeKeys.gitee);
       GiteeConfig config = GiteeConfig.fromJson(json.decode(configStr));
       if (isBlank(config.repo) || isBlank(config.token)) {
         _view.loadError('读取配置错误！');
-        return;
+        return false;
       }
       String url = pathutil.joinAll([
         'repos',
@@ -69,7 +70,10 @@ class GiteeRepoPagePresenter {
       if (!isBlank(config.branch)) {
         query["branch"] = config.branch;
       }
-      GiteeApi.deleteFile(url, query);
-    } catch (e) {}
+      await GiteeApi.deleteFile(url, query);
+      return true;
+    } catch (e) {
+      return false;
+    }
   }
 }