Bug 76530 [options] Warn about unused local variables and private members
I think we should warn about unused local variables and unused private members by default. These things are errors akin to unused imports, which we already warn about.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/UnresolvedTypesQuickFixTest.java
StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("import test2.*;\n");
		buf.append("import test3.*;\n");		
		buf.append("public class E {\n");
		buf.append("    B b;\n");
		buf.append("    C c;\n");		
		buf.append("    public void foo() {");
		buf.append("        try {\n");
		buf.append("        } catch (A e) {\n");
		buf.append("        }\n");		
		buf.append("    }\n");
		buf.append("}\n");
		ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);		
		CompilationUnit astRoot= getASTRoot(cu);
		ArrayList proposals= collectCorrections(cu, astRoot);
		assertNumberOfProposals(proposals, 2);
		assertCorrectLabels(proposals);
		
		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		String preview1= getPreviewContent(proposal);
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("import test2.*;\n");
		buf.append("import test2.A;\n");
		buf.append("import test3.*;\n");
		buf.append("public class E {\n");
		buf.append("    B b;\n");
		buf.append("    C c;\n");		
		buf.append("    public void foo() {");