Cleanup: Use foreach whenever is possible

src/com/sheepit/client/Configuration.java

@@ -197,8 +197,7 @@ public class Configuration {
 		
 		File[] files = dir.listFiles();
 		if (files != null) {
-			for (int i = 0; i < files.length; i++) {
-				File file = files[i];
+			for (File file : files) {
 				if (file.isDirectory()) {
 					Utils.delete(file);
 				}