Remove special-case for listing with max-keys=0

The existing list logic handles this; the underlying jclouds request
confused me and will be corrected in jclouds/jclouds#475.

src/main/java/org/gaul/s3proxy/S3ProxyHandler.java

@@ -134,11 +134,6 @@ final class S3ProxyHandler extends AbstractHandler {
                 handleContainerAcl(response, uri.substring(1));
                 baseRequest.setHandled(true);
                 return;
-            } else if (uri.lastIndexOf("/") == 0 &&
-                    "0".equals(request.getParameter("max-keys"))) {
-                handleContainerExists(response, uri.substring(1));
-                baseRequest.setHandled(true);
-                return;
             } else if (uri.lastIndexOf("/") == 0) {
                 handleBlobList(request, response, uri.substring(1));
                 baseRequest.setHandled(true);