Bug 116836 [clean up] Remove unnecessary casts
I20051116-1332 Clean up could offer "Remove unnecessary casts".
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/CleanUpTest.java
CompilationUnit[] units= compile(new ICompilationUnit[] {cu1, cu2, cu3});
		assertNumberOfProblems(units[0], 1);
		assertNumberOfProblems(units[1], 2);
		assertNumberOfProblems(units[2], 3);
		
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E1 {\n");
		buf.append("    public void foo() {\n");
		buf.append("    }\n");
		buf.append("}\n");
		String expected1= buf.toString();
		
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E2 {\n");
		buf.append("}\n");
		String expected2= buf.toString();
		
		buf= new StringBuffer();
		buf.append("package test2;\n");
		buf.append("import test1.E2;\n");
		buf.append("public class E3 extends E2 {\n");
		buf.append("}\n");
		String expected3= buf.toString();
		int numberOfFixes= 3;
		int offset= 0;
		String[] previews= new String[numberOfFixes];
		for (int i= offset; i < numberOfFixes; i++) {