[Turnstile] Removes availability (#20602)

* remove plan availability

* theme

Author: patriciasantaana

src/content/docs/turnstile/concepts/widget.mdx

@@ -12,7 +12,7 @@ Every instance of Turnstile belongs to a Turnstile widget. It is configured on a
 
 The 3 modes for Turnstile are **Managed**, **Non-Interactive**, and **Invisible**.
 
-Refer to [appearance modes](/turnstile/get-started/client-side-rendering/#appearance-modes) to configure whether to have the widget be always visible or visible only when interaction is required.
+Refer to [appearance modes](/turnstile/get-started/client-side-rendering/#appearance-modes) to configure whether to have the widget be always visible or visible only when interaction is required, and to customize your widget theme between automatic, light, or dark mode. 
 
 Widgets can be implemented in normal, flexible, or compact sizes.
 

src/content/docs/turnstile/index.mdx

@@ -26,8 +26,6 @@ Cloudflare’s smart CAPTCHA alternative.
 
 Turnstile can be embedded into any website without sending traffic through Cloudflare and works without showing visitors a CAPTCHA.
 
-<Plan type="all" />
-
 ![Turnstile Overview](~/assets/images/turnstile/turnstile-overview.png)
 
 <Render file="challenge-behavior" />