fix(renderer.h): drop abandoned stuff [no ci]

app/src/main/cpp/lorie/renderer.h

@@ -2,13 +2,6 @@
 #include <jni.h>
 #include <android/hardware_buffer.h>
 
-// X server is already linked to mesa so linking to Android's GLESv2 will confuse the linker.
-// That is a reason why we should compile renderer as separate hared library with its own dependencies.
-// In that case part of X server's api is unavailable,
-// so we should pass addresses to all needed functions to the renderer lib.
-typedef void (*renderer_message_func_type) (int type, int verb, const char *format, ...);
-__unused void renderer_message_func(renderer_message_func_type function);
-
 __unused int renderer_init(JNIEnv* env, int* legacy_drawing, uint8_t* flip);
 __unused void renderer_set_buffer(JNIEnv* env, AHardwareBuffer* buffer);
 __unused void renderer_set_window(JNIEnv* env, jobject surface, AHardwareBuffer* buffer);