Remove deprecated Polymer.register

Author: dfreedm

src/deprecated.js

@@ -5,10 +5,3 @@
  */
 
 // NOTE: put deprecated methods here that throw a useful error
-Polymer.register = function(context) {
-  if (context != window) {
-    // context is the <element> here, with a name attribute
-    var name = context.getAttribute('name');
-    throw new Error('Polymer.register is deprecated in declaration of ' + name + '. Please see http://www.polymer-project.org/getting-started.html');
-  }
-};