Revert "Update filesize.markdown (home-assistant#21904)" (home-assist…

…ant#21909)

source/_integrations/filesize.markdown

@@ -9,8 +9,6 @@ ha_release: 0.64
 ha_domain: filesize
 ha_platforms:
   - sensor
-ha_codeowners:
-  - '@gjohansson-ST'
 ---
 
 The `filesize` sensor is for displaying the size in MB of a file.
@@ -21,4 +19,20 @@ File paths must also be added to [allowlist_external_dirs](/docs/configuration/b
 
 </div>
 
-{% include integrations/config_flow.md %}
+## Configuration
+
+To enable the `filesize` sensor, add the following lines to your `configuration.yaml`:
+
+```yaml
+sensor:
+  - platform: filesize
+    file_paths:
+      - /config/home-assistant_v2.db
+  ```
+
+{% configuration %}
+file_paths:
+  description: The absolute path to the file.
+  required: true
+  type: list
+{% endconfiguration %}