ImageJ launcher: remove obsolete warnings
ImageJ launcher: remove obsolete warnings

Neither the launcher nor Fiji Build are built by Fiji Build itself
any longer.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

TehSAUCE/imagej,biovoxxel/imagej,biovoxxel/imagej,biovoxxel/imagej,TehSAUCE/imagej,TehSAUCE/imagej