Removed SDF test program

There's a much better example of SDF support in testgputext in SDL_ttf

test/CMakeLists.txt

@@ -355,7 +355,6 @@ elseif(IOS OR TVOS)
     target_link_libraries(testgles PRIVATE "${GLES_LIB}")
 endif()
 add_sdl_test_executable(testgles2 SOURCES testgles2.c)
-add_sdl_test_executable(testgles2_sdf NEEDS_RESOURCES TESTUTILS SOURCES testgles2_sdf.c)
 add_sdl_test_executable(testhaptic SOURCES testhaptic.c)
 add_sdl_test_executable(testhotplug SOURCES testhotplug.c)
 add_sdl_test_executable(testpen SOURCES testpen.c)