[docs] Remove OTEL_DOTNET_AUTO_LOGS_INCLUDE_FORMATTED_MESSAGE from internal logs section (open-telemetry#4339)

it is used only on the exporter side

Author: Kielek

docs/config.md

@@ -498,8 +498,7 @@ If the default log directories can't be created,
 the instrumentation uses the path of the current user's [temporary folder](https://docs.microsoft.com/en-us/dotnet/api/System.IO.Path.GetTempPath?view=net-6.0)
 instead.
 
-| Environment variable                              | Description                                                             | Default value                            | Status                                                                                                                            |
-|---------------------------------------------------|-------------------------------------------------------------------------|------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|
-| `OTEL_DOTNET_AUTO_LOG_DIRECTORY`                  | Directory of the .NET Tracer logs.                                      | *See the previous note on default paths* | [Experimental](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/versioning-and-stability.md) |
-| `OTEL_LOG_LEVEL`                                  | SDK log level. (supported values: `none`,`error`,`warn`,`info`,`debug`) | `info`                                   | [Stable](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/versioning-and-stability.md)       |
-| `OTEL_DOTNET_AUTO_LOGS_INCLUDE_FORMATTED_MESSAGE` | Whether the log state should be formatted.                              | `false`                                  | [Experimental](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/versioning-and-stability.md) |
+| Environment variable             | Description                                                             | Default value                            | Status                                                                                                                            |
+|----------------------------------|-------------------------------------------------------------------------|------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|
+| `OTEL_DOTNET_AUTO_LOG_DIRECTORY` | Directory of the .NET Tracer logs.                                      | *See the previous note on default paths* | [Experimental](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/versioning-and-stability.md) |
+| `OTEL_LOG_LEVEL`                 | SDK log level. (supported values: `none`,`error`,`warn`,`info`,`debug`) | `info`                                   | [Stable](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/versioning-and-stability.md)       |