Remove the icon symlink, let it get created when needed.

(msysgit doesn't handle symlinks well)

Change-Id: I0e3a92ed296366fbc970c5afaebe412d7aeb1142
Reviewed-on: http://gerrit.dmdirc.com/1230
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Gregory Holmes <greg@dmdirc.com>

launcher/windows/icon.ico

@@ -1 +0,0 @@
-../../src/com/dmdirc/res/icon.ico