chore(*) remove config cache

src/gateway/plan-and-deploy/hybrid-mode/hybrid-mode-setup.md

@@ -501,16 +501,6 @@ kong:{{page.kong_versions[page.version-index].ce-version}}-alpine
     You can also choose to encrypt or disable the data plane configuration
     cache with some additional settings:
 
-    `KONG_DATA_PLANE_CONFIG_CACHE_MODE`
-    : Optional setting for storing the config cache, defaults to `unencrypted`.
-    Change this to `encrypted` if you want to store the data plane's config cache
-    in an encrypted format, or set it to `off` if you don't want to use a cache.
-    Not available in open-source deployments.
-
-    `KONG_DATA_PLANE_CONFIG_CACHE_PATH`
-    : An optional custom path to the config cache. Not available in open-source
-    deployments.
-
 1. If needed, bring up any subsequent data planes using the same settings.
 
 {% endnavtab %}
@@ -582,16 +572,6 @@ and follow the instructions in Steps 1 and 2 **only** to download
     You can also choose to encrypt or disable the data plane configuration
     cache with some additional settings:
 
-    `data_plane_config_cache_mode`
-    : Optional setting for storing the config cache, defaults to `unencrypted`.
-    Change this to `encrypted` if you want to store the data plane's config cache
-    in an encrypted format, or set it to `off` if you don't want to use a cache.
-    Not available in open-source deployments.
-
-    `data_plane_config_cache_path`
-    : An optional custom path to the config cache. Not available in open-source
-    deployments.
-
 3. Restart Kong for the settings to take effect:
     ```bash
     kong restart
@@ -679,8 +659,6 @@ Parameter | Description | CP or DP {:width=10%:}
 [`cluster_telemetry_endpoint`](/gateway/{{page.kong_version}}/reference/configuration/#cluster_telemetry_endpoint) <span class="badge enterprise"/> <br>*Required for Enterprise deployments* | The port that the data plane uses to send telemetry data to the control plane. Ignored on control plane nodes. | DP
 [`cluster_control_plane`](/gateway/{{page.kong_version}}/reference/configuration/#cluster_control_plane) <br>*Required* | Address and port that the data plane nodes use to connect to the control plane. Must point to the port configured using the [`cluster_listen`](/gateway/{{page.kong_version}}/reference/configuration/#cluster_listen) property on the control plane node. Ignored on control plane nodes. | DP
 [`cluster_mtls`](/gateway/{{page.kong_version}}/reference/configuration/#cluster_mtls) <br>*Optional* <br><br>**Default:** `shared` | One of `shared` or `pki`. Indicates whether hybrid mode will use a shared certificate/key pair for CP/DP mTLS or if PKI mode will be used. See below sections for differences in mTLS modes. | Both
-[`data_plane_config_cache_mode`](/gateway/{{page.kong_version}}/reference/configuration/#data_plane_config_cache_mode) <span class="badge enterprise"/> <br>*Optional* <br><br>**Default:** `unencrypted` | Determines how the data plane configuration cache is stored. <br> &#8226; `unencrypted`: Stores configuration without encrypting it in `config.cache.json.gz` <br> &#8226; `encrypted`: Encrypts and stores the configuration cache in `.config.cache.jwt` (hidden file). <br> &#8226; `off`: The data plane does not cache configuration | DP
-[`data_plane_config_cache_path`](/gateway/{{page.kong_version}}/reference/configuration/#data_plane_config_cache_path) <span class="badge enterprise"/> <br>*Optional* <br><br>**Default:** Kong [`prefix` path](/gateway/{{page.kong_version}}/reference/configuration/#prefix) | Path to the data plane config cache file, for example `/tmp/kong-config-cache`. If the cache mode is `encrypted`, the filename is `.config.cache.jwt` (hidden file). If the cache mode is `unencrypted`, the filename is `config.cache.json.gz`. | DP
 
 The following properties are used differently between `shared` and `pki` modes:
 

src/gateway/plan-and-deploy/hybrid-mode/index.md

@@ -154,28 +154,25 @@ the control plane after verifying the success and correctness of the procedure.
 During that time, the data plane will keep working with the latest configuration.
 
 A new data plane node can be provisioned during control plane downtime. This
-requires either copying the config cache file (`config.json.gz`) from another
+requires either copying the LMDB directory (`dbless.lmdb`) from another
 data plane node, or using a declarative configuration. In either case, if it
 has the role of `"data_plane"`, it will also keep trying to contact the control
 plane until it's up again.
 
 To change a disconnected data plane node's configuration, you have to remove
-the config cache file (`config.json.gz`), ensure the `declarative_config`
+the LMDB directory (`dbless.lmdb`), ensure the `declarative_config`
 parameter or the `KONG_DECLARATIVE_CONFIG` environment variable is set, and set
 the whole configuration in the referenced YAML file.
 
 ### Data plane cache configuration
 {:.badge .enterprise}
 
 By default, data planes store their configuration to the file system
-in an unencrypted cache file, `config.json.gz`, in {{site.base_gateway}}'s
-`prefix` path. You can also choose to encrypt this cache, or disable it entirely.
+in an unencrypted LMDB database, `dbless.lmdb`, in {{site.base_gateway}}'s
+`prefix` path. <<You can also choose to encrypt this database (TODO in progress)>>.
 
 If encrypted, the data plane uses the cluster certificate key to decrypt the
-configuration cache on startup.
-
-See [`data_plane_config_cache_mode`](/gateway/{{page.kong_version}}/reference/configuration/#data_plane_config_cache_mode)
-and [`data_plane_config_cache_path`](/gateway/{{page.kong_version}}/reference/configuration/#data_plane_config_cache_path).
+LMDB database on startup.
 
 ## Limitations
 

src/gateway/reference/configuration.md

@@ -738,38 +738,6 @@ node to which telemetry updates will be posted in `host:port` format.
 
 ---
 
-#### data_plane_config_cache_mode
-{:.badge .enterprise}
-
-Data planes can store their config to file system as a backup in case the node
-is restarted or reloaded to faster bring the node in configured state or in case
-there are issues connecting to control plane.
-
-This parameter can be used to control the behavior.
-
-To be used by data plane nodes only: `unencrypted` = stores config cache
-unencrypted `encrypted` = stores config cache encrypted `off` = does not store
-the config cache
-
-**Default:** `unencrypted`
-
----
-
-#### data_plane_config_cache_path
-{:.badge .enterprise}
-
-The unencrypted config cache is stored by default to Kong `prefix` with a
-filename `config.cache.json.gz`.
-
-The encrypted config cache is stored by default to Kong `prefix` with a
-filename `.config.cache.jwt` Alternatively you can specify path for config cache
-with this parameter, e.g. `/tmp/kong-config-cache`.
-
-**Default:** none
-
----
-
-
 ### Hybrid Mode Control Plane section
 
 #### cluster_listen