Revert "Bugfix: Ignore enter_notify when warping pointer (makes "goto" work correctly)"

This reverts commit 7d6e80b5ef.
Instead fix it by setting focus correctly before causig the warp.

src/handlers.c

@@ -46,13 +46,7 @@
    changing workspaces */
 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
 
-/*
- * Adds the sequence number of an event to the ignored events.
- * Useful to ignore for example the enter notify caused by a pointer warp of
- * i3.
- *
- */
-void add_ignore_event(const int sequence) {
+static void add_ignore_event(const int sequence) {
         struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
 
         event->sequence = sequence;