[ox] Remove std::move calls that suppressed copy elision

deps/ox/src/ox/mc/write.hpp

@@ -231,7 +231,7 @@ Result<Buffer> writeMC(T *val) noexcept {
 	MetalClawWriter writer(reinterpret_cast<uint8_t*>(buff.data()), buff.size());
 	oxReturnError(model(&writer, val));
 	buff.resize(writer.size());
-	return std::move(buff);
+	return buff;
 }
 
 template<typename T>