chore($resource): remove undocumented API

This code has been in the $resource service since 2010, but was
never documented and can therefore be removed. It'll save precious bytes!

Shout-out to @gkalpak for finding this

Closes #16267

src/ngResource/resource.js

@@ -841,11 +841,6 @@ angular.module('ngResource', ['ng']).
           };
         });
 
-        Resource.bind = function(additionalParamDefaults) {
-          var extendedParamDefaults = extend({}, paramDefaults, additionalParamDefaults);
-          return resourceFactory(url, extendedParamDefaults, actions, options);
-        };
-
         return Resource;
       }
 

test/ngResource/resourceSpec.js

@@ -728,30 +728,6 @@ describe('basic usage', function() {
   });
 
 
-  it('should bind default parameters', function() {
-    $httpBackend.expect('GET', '/CreditCard/123.visa?minimum=0.05').respond({id: 123});
-    var Visa = CreditCard.bind({verb: '.visa', minimum: 0.05});
-    var visa = Visa.get({id: 123});
-    $httpBackend.flush();
-    expect(visa).toEqualData({id: 123});
-  });
-
-
-  it('should pass all original arguments when binding default params', function() {
-    $httpBackend.expect('GET', '/CancellableCreditCard/123.visa').respond({id: 123});
-
-    var CancellableCreditCard = $resource('/CancellableCreditCard/:id:verb', {},
-                                          {charge: {method: 'POST'}}, {cancellable: true});
-    var CancellableVisa = CancellableCreditCard.bind({verb: '.visa'});
-    var visa = CancellableVisa.get({id: 123});
-
-    $httpBackend.flush();
-
-    expect(visa.$charge).toEqual(jasmine.any(Function));
-    expect(visa.$cancelRequest).toEqual(jasmine.any(Function));
-  });
-
-
   it('should support dynamic default parameters (global)', function() {
     var currentGroup = 'students',
         Person = $resource('/Person/:group/:id', { group: function() { return currentGroup; }});