Fix: S3 parameter error (#12290)

### What problem does this PR solve?

Fix: S3 parameter error

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

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Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/pages/user-setting/data-source/constant/index.tsx

@@ -747,7 +747,6 @@ export const DataSourceFormDefaultValues = {
     config: {
       bucket_name: '',
       bucket_type: 's3',
-      authMode: 'access_key',
       prefix: '',
       credentials: {
         aws_access_key_id: '',