Remove unused CallbacksRegistry.call method

lib/common/api/callbacks-registry.js

@@ -44,10 +44,6 @@ class CallbacksRegistry {
     return (ref = this.callbacks[id]) != null ? ref : function () {}
   }
 
-  call (id, ...args) {
-    return this.get(id).call(global, ...args)
-  }
-
   apply (id, ...args) {
     return this.get(id).apply(global, ...args)
   }