[sdl3] Remove explicit export of createContext. NFC (#25405)

This was fixed upstream in libsdl-org/SDL#12970

Author: sbc100

tools/ports/sdl3.py

@@ -25,12 +25,6 @@ def get_lib_name(settings):
   return 'libSDL3' + ('-mt' if settings.PTHREADS else '') + '.a'
 
 
-def process_dependencies(settings, cflags_only):
-  if not cflags_only:
-    # SDL3 includes an internal reference to Module['createContext']
-    settings.EXPORTED_RUNTIME_METHODS.append('createContext')
-
-
 def get(ports, settings, shared):
   # get the port
   ports.fetch_project('sdl3', f'https://github.com/libsdl-org/SDL/archive/{TAG}.zip', sha512hash=HASH)