Revert "x11: Send key events for dead keys consumed by the IME"

This and its related commits introduced some bugs and quirks such as duplicated and delayed/missed key events that can't be easily worked around, so revert this for now.

This reverts commit 47162a4168.

src/video/x11/SDL_x11events.c

@@ -987,18 +987,16 @@ void X11_HandleKeyEvent(SDL_VideoDevice *_this, SDL_WindowData *windowdata, SDL_
         }
     }
 
+    if (!handled_by_ime) {
         if (pressed) {
             X11_HandleModifierKeys(videodata, scancode, true, true);
             SDL_SendKeyboardKeyIgnoreModifiers(timestamp, keyboardID, keycode, scancode, true);
 
-        // Synthesize a text event if the IME didn't consume a printable character
             if (*text && !(SDL_GetModState() & (SDL_KMOD_CTRL | SDL_KMOD_ALT))) {
                 text[text_length] = '\0';
                 X11_ClearComposition(windowdata);
                 SDL_SendKeyboardText(text);
             }
-
-        X11_UpdateUserTime(windowdata, xevent->xkey.time);
         } else {
             if (X11_KeyRepeat(display, xevent)) {
                 // We're about to get a repeated key down, ignore the key up
@@ -1010,6 +1008,11 @@ void X11_HandleKeyEvent(SDL_VideoDevice *_this, SDL_WindowData *windowdata, SDL_
         }
     }
 
+    if (pressed) {
+        X11_UpdateUserTime(windowdata, xevent->xkey.time);
+    }
+}
+
 void X11_HandleButtonPress(SDL_VideoDevice *_this, SDL_WindowData *windowdata, SDL_MouseID mouseID, int button, float x, float y, unsigned long time)
 {
     SDL_Window *window = windowdata->window;