disconnect unused signal connected to a removed method

Handler "_on_pause_pressed" has been removed but not the signal from the button.

gui/rich_text_bbcode/rich_text_bbcode.tscn

@@ -88,5 +88,4 @@ shortcut_in_tooltip = false
 text = "Pause"
 
 [connection signal="meta_clicked" from="RichTextLabel" to="." method="_on_RichTextLabel_meta_clicked"]
-[connection signal="pressed" from="Pause" to="." method="_on_pause_pressed"]
 [connection signal="toggled" from="Pause" to="." method="_on_pause_toggled"]