remove duplicated entry

Author: marcosmoura

README.md

@@ -13,10 +13,6 @@
 
   <a href="https://www.npmjs.com/package/vue-material">
     <img src="https://img.shields.io/npm/v/vue-material.svg" alt="Version">
-</a>
-
-  <a href="https://cdnjs.com/libraries/vue-material">
-    <img src="https://img.shields.io/cdnjs/v/vue-material.svg" alt="Version">
   </a>
 
   <a href="https://cdnjs.com/libraries/vue-material">