Removed unused getter

include/storage_credential.h

@@ -81,10 +81,6 @@ namespace azure {  namespace storage_lite {
 
         void sign_request(const storage_request_base &, http_base &, const storage_url &, const storage_headers &) const override;
 
-        const std::string &token() const {
-            return m_token;
-        }
-
         void set_token(const std::string& token);
 
     private: