git-gui: Don't create PkgInfo on Mac OS X "desktop icons".

Turns out that we really don't need the Contents/PkgInfo file on Mac OS
10.4.  The Finder will still launch the application properly without one.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

git-gui

@@ -2216,10 +2216,6 @@ proc do_macosx_app {} {
 
 				file mkdir $MacOS
 
-				set fd [open [file join $Contents PkgInfo] w]
-				puts -nonewline $fd {APPL????}
-				close $fd
-
 				set fd [open [file join $Contents Info.plist] w]
 				puts $fd {<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">