STYLE: Fix help message layout removing logging of application name

This commit removes the debug message added in r24004 (ENH: Allow
application name to be defined by argv0)

Prior to this commit, the name of the application was displayed
between the launcher help message and the application one:

8<---8<---8<---8<---8<---8<---8<---8<---8<---8<---8<---8<---
[...]
--xterm Start xterm
--gdb Start gdb
applicationName: "Slicer"
--, --ignore-rest Ignores the rest of the labeled arguments following this flag. (default: false)
-h, --help Display available command line arguments
[...]
8<---8<---8<---8<---8<---8<---8<---8<---8<---8<---8<---8<---

git-svn-id: http://svn.slicer.org/Slicer4/trunk@24053 3bd1e089-480b-0410-8dfb-8563597acbee