Remove fs.Shell() and Filer.Shell() functions

tests/spec/fs.shell.spec.js

@@ -1,29 +0,0 @@
-var Filer = require('../../src');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.Shell', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('is a function', function() {
-    var fs = util.fs();
-    expect(typeof fs.Shell).to.equal('function');
-  });
-
-  it('should return a FileSystemShell instance', function() {
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    expect(sh.prototype).to.deep.equal((new Filer.Shell(fs)).prototype);
-  });
-
-  it('should reflect changes to the prototype', function(){
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    Filer.Shell.prototype.test = 'foo';
-
-    expect(sh.test).to.equal('foo');
-  });
-});