message: remove the elif branch which already covered by else
diff: @@ -47,10 +47,6 @@ limitations under the License.
  // EMSCRIPTEN builds are considered "mobile" for the sake of portability.
  #define IS_MOBILE_PLATFORM
  -#elif defined(__arm__) || defined(__aarch64__)
  -// If no platform specified, use:
  -#define PLATFORM_POSIX
  -
  #else
  // If no platform specified, use:
  #define PLATFORM_POSIX
  