Removed SDL_DROPEVENT_DATA_SIZE and SDL_TEXTEDITINGEVENT_TEXT_SIZE

Fixes https://github.com/libsdl-org/SDL/issues/9681

include/SDL3/SDL_events.h

@@ -313,8 +313,6 @@ typedef struct SDL_KeyboardEvent
     SDL_Keysym keysym;  /**< The key that was pressed or released */
 } SDL_KeyboardEvent;
 
-#define SDL_TEXTEDITINGEVENT_TEXT_SIZE 64
-
 /**
  * Keyboard text editing event structure (event.edit.*)
  *
@@ -664,8 +662,6 @@ typedef struct SDL_TouchFingerEvent
 } SDL_TouchFingerEvent;
 
 
-#define SDL_DROPEVENT_DATA_SIZE 64
-
 /**
  * Pressure-sensitive pen touched or stopped touching surface (event.ptip.*)
  *