Deprecated: Drop size and andSelf methods

(cherry-picked from f110360f65a268e959ae892ca36e85da3d91e606)

Fixes gh-1749
Closes gh-1822

src/deprecated.js

-define([
-	"./core",
-	"./traversing"
-], function( jQuery ) {
-
-// The number of elements contained in the matched element set
-jQuery.fn.size = function() {
-	return this.length;
-};
-
-jQuery.fn.andSelf = jQuery.fn.addBack;
-
+define(function() {
 });

test/unit/deprecated.js

 module("deprecated", { teardown: moduleTeardown });
 
-if ( jQuery.fn.size ) {
-	test("size()", function() {
-		expect(1);
-		equal( jQuery("#qunit-fixture p").size(), 6, "Get Number of Elements Found" );
-	});
-}