docs: remove obsolete comment

Author: vkarpov15

lib/helpers/model/applyStaticHooks.js

@@ -42,8 +42,6 @@ module.exports = function applyStaticHooks(model, hooks, statics) {
         const cb = typeof lastArg === 'function' ? lastArg : null;
         const args = Array.prototype.slice.
           call(arguments, 0, cb == null ? numArgs : numArgs - 1);
-        // Special case: can't use `Kareem#wrap()` because it doesn't currently
-        // support wrapped functions that return a promise.
         return promiseOrCallback(cb, callback => {
           hooks.execPre(key, model, args).then(() => onPreComplete(null), err => onPreComplete(err));