remove KEY_OC_VERSION key

Author: theScrabi

owncloudComLibrary/src/main/java/com/owncloud/android/lib/common/accounts/AccountUtils.java

@@ -299,11 +299,6 @@ public static class Constants {
 
         public static final String OAUTH_SUPPORTED_TRUE = "TRUE";
 
-        /**
-         * OC account cookies
-         */
-        public static final String KEY_COOKIES = "oc_account_cookies";
-
         /**
          * OC account version
          */