[gtk/readonly-events-1] docs: Remove some no-longer existing api

[Matthias Clasen <matthiasc src gnome org>]

commit 0b5621ae0b54d7ad4e84a55fb494c4b3ef177949
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Feb 20 21:29:00 2020 -0500

    docs: Remove some no-longer existing api

 docs/reference/gtk/gtk4-sections.txt | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/docs/reference/gtk/gtk4-sections.txt b/docs/reference/gtk/gtk4-sections.txt
index e87210ae85..d07ff517c1 100644
--- a/docs/reference/gtk/gtk4-sections.txt
+++ b/docs/reference/gtk/gtk4-sections.txt
@@ -4433,9 +4433,6 @@ gtk_get_current_event
 gtk_get_current_event_time
 gtk_get_current_event_state
 gtk_get_current_event_device
-gtk_get_event_widget
-gtk_get_event_target
-gtk_get_event_target_with_type
 
 <SUBSECTION Private>
 gtk_init_abi_check