Revert "Update uuid C++ implementation"

This reverts commit 1cdb08a81a.

src/uuid/uuid.h

@@ -20,16 +20,11 @@ struct WUUID {
 	Str8 uuid;
 };
 
-#ifdef WAPP_PLATFORM_CPP
-#define wapp_uuid_gen_uuid4() ([&](){
-	wapp_persist WUUID id = wapp_uuid_create();
-	return *wapp_uuid_init_uuid4(&id);
-}())
-#define wapp_uuid_create() (WUUID{wapp_str8_buf(UUID_BUF_LENGTH)})
-#else
 #define wapp_uuid_gen_uuid4() *(wapp_uuid_init_uuid4(&wapp_uuid_create()))
+
+/* Low level UUID API */
+
 #define wapp_uuid_create() ((WUUID){.uuid = wapp_str8_buf(UUID_BUF_LENGTH)})
-#endif
 
 // Just returns the same pointer that was passed in with the UUID initialised.
 // Fails when passed a NULL pointer.