revert docs changes

Author: morford-brex

docs/pages/product/configuration/data-sources/snowflake.mdx

@@ -134,11 +134,10 @@ Storage][google-cloud-storage] for export bucket functionality.
 <InfoBox>
 
 Ensure the AWS credentials are correctly configured in IAM to allow reads and
-writes to the export bucket in S3. You can authenticate using:
-
-- **IAM user credentials** - Explicit AWS access keys and secrets
-- **Storage integration** - Snowflake-managed AWS integration (may still require credentials for exported file processing)
-- **IAM roles** - Use execution environment roles (IRSA, instance profiles) for both Snowflake and Cube Store
+writes to the export bucket in S3 if you are not using storage integration.
+If you are using storage integration then you still need to configure access keys
+for Cube Store to be able to read from the export bucket.
+It's possible to authenticate with IAM roles instead of access keys for Cube Store.
 
 </InfoBox>
 
@@ -172,13 +171,6 @@ CUBEJS_DB_EXPORT_INTEGRATION=aws_int
 CUBEJS_DB_EXPORT_BUCKET_AWS_REGION=<AWS_REGION>
 ```
 
-Using IAM roles for both Snowflake and Cube Store (no credentials required):
-```dotenv
-CUBEJS_DB_EXPORT_BUCKET_TYPE=s3
-CUBEJS_DB_EXPORT_BUCKET=my.bucket.on.s3
-CUBEJS_DB_EXPORT_BUCKET_AWS_REGION=<AWS_REGION>
-```
-
 
 #### Google Cloud Storage