Remove mentions for sg-private from Cody Gateway docs (#695)

- https://sourcegraph.slack.com/archives/C01DXLN3D0T/p1728330699075699

Author: MaedahBatool

docs/cody/core-concepts/cody-gateway.mdx

@@ -62,6 +62,4 @@ In addition to the above, we may throttle concurrent requests to Cody Gateway pe
 
 Sourcegraph Cody Gateway does not retain sensitive data (prompt test and source code included in requests, etc.) from any traffic received. Only rate limit consumption per Sourcegraph Enterprise license and some high-level diagnostic data (error codes from upstream, numeric/enum request parameters, etc) are tracked.
 
-The code that powers Cody Gateway is also [source-available](https://sourcegraph.com/search?q=context:global+repo:%5Egithub%5C.com/sourcegraph/sourcegraph$+f:cmd/cody-gateway+lang:go&patternType=keyword&groupBy=path) for audit.
-
 For more details about Cody Gateway security practices, please reach out to your account manager. You can also refer to the [Cody usage and privacy notice](https://about.sourcegraph.com/terms/cody-notice) for more privacy details about Cody in general.