Bug 54468 Remove non-default-encoding-alert from CompilationUnitEditor
no longer necessary with new encoding support.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();
			if (asv != null) {
					
				String p= event.getProperty();		
				
				if (CLOSE_BRACKETS.equals(p)) {
					fBracketInserter.setCloseBracketsEnabled(getNewPreferenceStore().getBoolean(p));
					return;	
				}
				if (CLOSE_STRINGS.equals(p)) {
					fBracketInserter.setCloseStringsEnabled(getNewPreferenceStore().getBoolean(p));
					return;
				}
								
				if (SPACES_FOR_TABS.equals(p)) {
					if (isTabConversionEnabled())
						startTabConversion();
					else
						stopTabConversion();
					return;
				}
				
				if (PreferenceConstants.EDITOR_SMART_TAB.equals(p)) {
					if (getNewPreferenceStore().getBoolean(PreferenceConstants.EDITOR_SMART_TAB)) {
						setActionActivationCode("IndentOnTab", '\t', -1, SWT.NONE); 
					} else {
						removeActionActivationCode("IndentOnTab"); 
					}
				}
				IContentAssistant c= asv.getContentAssistant();