[libsoup] docs: third party session features are no longer possible

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 6be67ca54be92ef8ce440a8a6b4f6576e840c937
Author: Carlos Garcia Campos <cgarcia igalia com>
Date:   Tue Jun 21 09:47:02 2022 +0200

    docs: third party session features are no longer possible

 docs/reference/client-thread-safety.md | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/docs/reference/client-thread-safety.md b/docs/reference/client-thread-safety.md
index f75eddb2..15286fb5 100644
--- a/docs/reference/client-thread-safety.md
+++ b/docs/reference/client-thread-safety.md
@@ -36,7 +36,4 @@ threads:
 
  - The sync API doesn't need any main context at all.
 
- - All internal session features are thread safe. Any third party
-   feature must be thread safe too in order to work with multiple
-   threads.