Revert "ecore: forcefully flush pending event when ecore_shutdown is called."

This reverts commit 2c6808e4ee.

this breaks a number of expectations and guarantees in efl:

* causes unexpected event iteration during app startup before main loop begins
  - leads to event loss
* causes unexpected event iteration during app shutdown after main loop quits
  - leads to invalid memory access
* causes recursive event iteration during event handler callbacks
  - leads to ?????????????????????????????????????????????????????????????????

all of these can be easily seen by running enlightenment, and all of these cause
unexpected behaviors in enlightenment including, but not limited to, a lot of crashes

fix T5232

src/lib/ecore/ecore.c

@@ -355,13 +355,6 @@ ecore_shutdown(void)
           ERR("Init count not greater than 0 in shutdown.");
           return 0;
        }
-
-     // We need to flush all pending event as this is
-     // the only way to properly avoid use after free
-     // during shutdown of component that may have
-     // emitted and still pending event.
-     _ecore_event_call();
-
      if (_ecore_init_count-- != _ecore_init_count_threshold)
        goto end;
 

src/lib/ecore/ecore_events.c

@@ -605,3 +605,4 @@ _ecore_event_signal_realtime_new(void)
 {
    return calloc(1, sizeof(Ecore_Event_Signal_Realtime));
 }
+