Enable testgles2 on all platforms

We use SDL's headers so we're not dependent on system OpenGL header availability.

test/CMakeLists.txt

@@ -354,11 +354,8 @@ elseif(IOS OR TVOS)
     find_library(GLES_LIB OpenGLES REQUIRED)
     target_link_libraries(testgles PRIVATE "${GLES_LIB}")
 endif()
-check_include_file("GLES2/gl2platform.h" HAVE_GLES2_GL2PLATFORM_H)
-if(HAVE_GLES2_GL2PLATFORM_H OR (TARGET SDL3-static OR SDL3-shared))
-    add_sdl_test_executable(testgles2 SOURCES testgles2.c)
-    add_sdl_test_executable(testgles2_sdf NEEDS_RESOURCES TESTUTILS SOURCES testgles2_sdf.c)
-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)