removing old diagnostics

Author: simorenoh

sdk/cosmos/azure-cosmos/CHANGELOG.md

@@ -11,6 +11,8 @@
 * Fixed bug with async patch_item method. See [PR 30804](https://github.com/Azure/azure-sdk-for-python/pull/30804).
 
 #### Other Changes
+* Removed outdated `diagnostics.py` file since we now recommend the use of our `CosmosHttpLoggingPolicy` for diagnostics.
+For more on the `CosmosHttpLoggingPolicy` see our [README](https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/cosmos/azure-cosmos#logging-diagnostics).
 
 ### 4.4.0 (2023-06-09)
 

sdk/cosmos/azure-cosmos/README.md

@@ -606,10 +606,10 @@ HTTP status code 409: The ID (name) provided for the container is already in use
 The container name must be unique within the database.""")
 
 ```
-### Logging
+### Logging Diagnostics
 
 This library uses the standard
-[logging](https://docs.python.org/3.5/library/logging.html) library for logging.
+[logging](https://docs.python.org/3.5/library/logging.html) library for logging diagnostics.
 Basic information about HTTP sessions (URLs, headers, etc.) is logged at INFO
 level.