Removed execute installer

(will be moved to unstable branch)

docs/concepts/install.md

@@ -36,18 +36,6 @@ In contrast to libraries, `inject` will not add that file to the classpath, but
 will also overwrite classes, which are already contained in the game jar, if they
 are also in injected file. 
 
-### execute
-
-args:
-
-- `[location]`
-- `[jar arguments]`
-
-`execute` can be used with an executable jar file. The jar file will be executed with the given arguments and
-the given location as working directory. A client should inform the user before just executing the file and
-ask them for permission to do so and/or it should execute the jar in a closed environment like a container
-to prevent malicous code from running.
-
 ### launch
 
 `launch` can be used to mark the selected file as the launch file for a specific side. Files having this