diff --git a/docs/header.md b/docs/header.md
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--- a/docs/header.md
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@@ -1,23 +0,0 @@
-# WordPress Edge Integrations: Vary Header
-
-## Filter reference
-
-### `pantheon.ei.supported_vary_headers`
-
-Modify the vary headers supported by the plugin.
-
-#### Parameters
-
-_(array)_ An array of vary headers supported by the plugin.
-
-#### Example
-
-```php
-add_filter( 'pantheon.ei.supported_vary_headers', 'supported_vary_headers' );
-
-function supported_vary_headers( array $data ) : array {
-	// Disable Interest header.
-	$data['Interest'] = false;
-	return $data;
-}
-```
\ No newline at end of file