docs: remove caching

Signed-off-by: Wing-Kam Wong <wingkwong.code@gmail.com>

packages/noco-docs/content/en/developer-resources/caching.md

@@ -1,9 +0,0 @@
----
-title: 'Caching'
-description: 'Caching'
-position: 1300
-category: 'Developer Resources'
-menuTitle: 'Caching'
----
-
-We introduced a Caching layer to store meta data by utilising Redis. By default, caching is enabled. If you prefer not to cache, you can configure it by setting environment variable `NC_DISABLE_CACHE` to `true`. You can also use your own Redis instance by setting environment variable `NC_REDIS_URL` (e.g. `redis://:authpassword@127.0.0.1:6380/4`). If you don't specify it, by default, it will be cached in memory.