docs(configuration): remove warning regarding cache properties usage (#4874)

Author: jamesgeorge007

src/content/configuration/other-options.mdx

@@ -355,8 +355,6 @@ module.exports = {
 };
 ```
 
-W> `cache.idleTimeout` is only available when [`cache.store`](#cachestore) is set to `'pack'`
-
 ### cache.idleTimeoutForInitialStore
 
 `number = 0`
@@ -374,8 +372,6 @@ module.exports = {
 };
 ```
 
-W> `cache.idleTimeoutForInitialStore` is only available when [`cache.store`](#cachestore) is set to `'pack'`
-
 ## dependencies
 
 `[string]`