ci: 移除设置 token 步骤

- 删除了 .cnb.yml 文件中的 set token 步骤
- 该步骤使用了 tencentcom/git-set-credential 镜像来设置 Git 凭证
- 移除这一步骤可能是因为不再需要使用 token 进行身份验证

.cnb.yml

@@ -7,15 +7,6 @@ main:
           script: |
             ./gorss --root ./docs > learning-weekly.xml
 
-        - name: set token
-          imports: https://cnb.cool/eryajf/build-env/-/blob/main/env.yaml
-          image: tencentcom/git-set-credential:latest
-          settings:
-            userName: ${CNB_TOKEN_USER_NAME}
-            userEmail: ${CNB_COMMITTER_EMAIL}
-            loginUserName: ${CNB_TOKEN_USER_NAME}
-            loginPassword: ${CNB_TOKEN}
-
         - name: commit
           image: tencentcom/git-commit:latest
           settings: