[gtk] Docs: Remove more since markers

[Matthias Clasen <matthiasc src gnome org>]

commit 88b4076fe5146c84e5a9fb590371c50917be604e
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jun 26 12:31:41 2018 -0400

    Docs: Remove more since markers
    
    The idea is that GTK+ 4 will be an epoch, API-wise.
    Everything that was around for 4.0 has been there
    since the beginning of the epoch and doesn't need
    markers.

 gtk/gtkeventcontrollermotion.c | 2 --
 gtk/gtkeventcontrollerscroll.c | 2 --
 gtk/gtkgesturestylus.c         | 2 --
 3 files changed, 6 deletions(-)
---
diff --git a/gtk/gtkeventcontrollermotion.c b/gtk/gtkeventcontrollermotion.c
index 3c85301f57..f1d0d33a77 100644
--- a/gtk/gtkeventcontrollermotion.c
+++ b/gtk/gtkeventcontrollermotion.c
@@ -25,8 +25,6 @@
  *
  * #GtkEventControllerMotion is an event controller meant for situations
  * where you need to track the position of the pointer.
- *
- * This object was added in 3.94.
  **/
 #include "config.h"
 
diff --git a/gtk/gtkeventcontrollerscroll.c b/gtk/gtkeventcontrollerscroll.c
index 694aea3867..db5db881d1 100644
--- a/gtk/gtkeventcontrollerscroll.c
+++ b/gtk/gtkeventcontrollerscroll.c
@@ -55,8 +55,6 @@
  * #GtkEventControllerScroll::decelerate signal, emitted at the end of scrolling
  * with two X/Y velocity arguments that are consistent with the motion that
  * was received.
- *
- * This object was added in 3.93.
  **/
 #include "config.h"
 
diff --git a/gtk/gtkgesturestylus.c b/gtk/gtkgesturestylus.c
index 8c011c3501..7b02d07954 100644
--- a/gtk/gtkgesturestylus.c
+++ b/gtk/gtkgesturestylus.c
@@ -165,8 +165,6 @@ gesture_get_current_event (GtkGestureStylus *gesture)
  * signals.
  *
  * Returns: #TRUE if there is a current value for the axis
- *
- * Since: 3.94
  **/
 gboolean
 gtk_gesture_stylus_get_axis (GtkGestureStylus *gesture,