replace include guards with pragma once

src/assets/Assets.hpp

@@ -1,5 +1,4 @@
-#ifndef ASSETS_ASSETS_HPP_
-#define ASSETS_ASSETS_HPP_
+#pragma once
 
 #include <functional>
 #include <memory>
@@ -113,5 +112,3 @@ void assetload::assets_setup(const Assets* assets) {
         }
     }
 }
-
-#endif  // ASSETS_ASSETS_HPP_

src/assets/AssetsLoader.hpp

@@ -1,5 +1,4 @@
-#ifndef ASSETS_ASSETS_LOADER_HPP_
-#define ASSETS_ASSETS_LOADER_HPP_
+#pragma once
 
 #include <filesystem>
 #include <functional>
@@ -104,5 +103,3 @@ public:
         const std::vector<std::filesystem::path>& alternatives
     );
 };
-
-#endif  // ASSETS_ASSETS_LOADER_HPP_

src/assets/assetload_funcs.hpp

@@ -1,5 +1,4 @@
-#ifndef ASSETS_ASSET_LOADERS_HPP_
-#define ASSETS_ASSET_LOADERS_HPP_
+#pragma once
 
 #include <memory>
 #include <string>
@@ -64,5 +63,3 @@ namespace assetload {
         const std::shared_ptr<AssetCfg>& settings
     );
 }
-
-#endif  // ASSETS_ASSET_LOADERS_HPP_