Remove Web UI issue from known issue page

Author: bishal41

articles/iot-operations/troubleshoot/known-issues.md

@@ -357,23 +357,6 @@ Log signature: N/A
 
 When you create a data flow, you can specify a schema in the source configuration. However, deserializing and validating messages using a schema isn't supported yet. Specifying a schema in the source configuration only allows the operations experience to display the list of data points, but the data points aren't validated against the schema.
 
-### X.509 secret incorrectly encoded in operations experience web UI
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-Issue ID: 8841
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-Log signature: N/A
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-<!-- TODO: double check -->
-When you create an X.509 secret in the operations experience, the secret is created with incorrectly encoded data.
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-To work around this issue, create the [multi-line secrets through Azure Key Vault](/azure/key-vault/secrets/multiline-secrets), then select it from the list of secrets in the operations experience.
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 ### Connection failures with Azure Event Grid
 
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