Add documentation for CommandAPI/CommandAPI#493

Author: DerEchtePilz

docs/en/upgrading-parts/9.7.0-to-10.0.0.md

@@ -1,5 +1,11 @@
+### Deprecated methods
+
+For 10.0.0, all previously deprecated methods have been removed. Please make sure you use the replacement methods for the deprecated methods. The replacement methods should be described in the JavaDocs of deprecated methods.
+
+-----
+
 ### Default namespace changes
 
 The default namespace has been updated from `minecraft` to the plugin's name. If you are not shading, the default namespace is going to be `commandapi`. If you are shading, the default namespace is going to be your plugin's name.
 
-Along with this change, the `CommandAPIBukkitConfig#usePluginNamespace()` has been deprecated since it is now default behaviour. 
+Along with this change, the `CommandAPIBukkitConfig#usePluginNamespace()` has been deprecated since it is now default behaviour.