[gtksourceview] Remove "Since 1.x" API comments

[Sébastien Wilmet <swilmet src gnome org>]

commit bc6fee25b36ae9173982b7eda4bd9312f3294943
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Aug 8 19:34:27 2015 +0200

    Remove "Since 1.x" API comments
    
    This is old enough. GTK-Doc complained about the missing index for 1.8.

 gtksourceview/gtksourceview.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/gtksourceview/gtksourceview.c b/gtksourceview/gtksourceview.c
index 2c98f3e..233ef56 100644
--- a/gtksourceview/gtksourceview.c
+++ b/gtksourceview/gtksourceview.c
@@ -4378,8 +4378,6 @@ gtk_source_view_set_insert_spaces_instead_of_tabs (GtkSourceView *view,
  * should get indented instead of replaced with the \t character.
  *
  * Return value: %TRUE if the selection is indented when tab is pressed.
- *
- * Since: 1.8
  */
 gboolean
 gtk_source_view_get_indent_on_tab (GtkSourceView *view)
@@ -4403,8 +4401,6 @@ gtk_source_view_get_indent_on_tab (GtkSourceView *view)
  *
  * When the selection doesn't span several lines, the tab key always replaces
  * the selection with a normal \t character.
- *
- * Since: 1.8
  */
 void
 gtk_source_view_set_indent_on_tab (GtkSourceView *view,