As the final part of the resolution
to bug 46576 (https://bugs.eclipse.org/bugs/show_bug.cgi?id=46576) all
unused icons have been removed from the UI plugins. Its possible
that active icons were inadvertently removed so if anyone notices such
a case (the image will either be missing or drawn as a small red box) please
report a bug to Platform UI.
Images referenced by the constants in
ISharedImages were not removed, so clients using the supported technique
of building images through the constants will not be affected. However,
clients using the unsupported pattern of building a filename and then finding
the image in the UI bundle may be broken. The proper solution in
these cases is for the client code to either use a constant from ISharedImages
or put the image into their own bundle.