Logging.md: Refer to se-edu/guides for logging level definitions

As logging level definition is already present in se-edu/guides,
let's remove it from Logging.md and refer to se-edu/guides version
instead.

docs/Logging.md

@@ -3,17 +3,9 @@ layout: page
 title: Logging guide
 ---
 
-We are using `java.util.logging` package for logging. The `LogsCenter`
-class is used to manage the logging levels and logging destinations.
-
-*  The logging level can be controlled using the `logLevel` setting in the configuration file (See the [Configuration](#configuration) section).
+* We are using `java.util.logging` package for logging.
+* The `LogsCenter` class is used to manage the logging levels and logging destinations.
 *  The `Logger` for a class can be obtained using `LogsCenter.getLogger(Class)` which will log messages according to the specified logging level.
-*  Log messages are output through: `Console` and to a `.log` file.
-
-**Logging Levels**
-
-* `SEVERE`: A critical problem detected which may cause the termination of the application.
-* `WARNING`: Can continue, but with caution.
-* `INFO`: Information showing the noteworthy actions by the App.
-* `FINE`: Details that is not usually noteworthy but may be useful in debugging e.g. print the actual list instead of just its size.
-
+*  Log messages are output through the console and to a `.log` file.
+*  The output logging level can be controlled using the `logLevel` setting in the configuration file (See the [Configuration guide](Configuration.md) section).
+* **When choosing a level for a log message**, follow the conventions given in [_[se-edu/guides] Java: Logging conventions_](https://se-education.org/guides/conventions/java/logging.html).