Delete icon folder for Platform UI bundles

Most SVGs were added directly to the eclipse bundles which removes the need for maintaining icons in the images repository.
This commit deletes all folders of Platform UI bundles in the images repository where all SVGs are existing and already copied directly to the specific bundle. For Platform UI this is the case for every folder.

The following folders will be deleted:
`org.eclipse.e4.ui.dialogs`
`org.eclipse.e4.ui.progress`
`org.eclipse.e4.ui.workbench.addons.swt`
`org.eclipse.e4.ui.workbench.renderers.swt`
`org.eclipse.e4.ui.workbench.swt`
`org.eclipse.jface.notifications`
`org.eclipse.jface.text`
`org.eclipse.jface`
`org.eclipse.search`
`org.eclipse.ui.browser`
`org.eclipse.ui.editors`
`org.eclipse.ui.forms`
`org.eclipse.ui.genericeditor`
`org.eclipse.ui.ide.application`
`org.eclipse.ui.ide`
`org.eclipse.ui.navigator.resources`
`org.eclipse.ui.navigator`
`org.eclipse.ui.views.log`
`org.eclipse.ui.views`
`org.eclipse.ui.workbench.texteditor`
`org.eclipse.ui`
`org.eclipse.ltk.ui.refactoring`

Author: Michael Bangas