JBIDE-14101 The class is not compatible with JDK 1.6: org.jboss.tools.jst.web.ui.palette.html.wizard.HTMLWizardVisualPreviewInitializationException

Because I cannot find any use of that java-1.7-like constructor I just removed it from HTMLWizardVisualPreviewInitializationException class.

	modified:   plugins/org.jboss.tools.jst.web.ui/src/org/jboss/tools/jst/web/ui/palette/html/wizard/HTMLWizardVisualPreviewInitializationException.java