Minor code simplification (ToMap instead of section->GetKeys)

See #18442

Core/Config.cpp

@@ -1893,19 +1893,14 @@ void PlayTimeTracker::Stop(const std::string &gameId) {
 void PlayTimeTracker::Load(const Section *section) {
 	tracker_.clear();
 
-	std::vector<std::string> keys;
-	section->GetKeys(keys);
-
-	for (auto key : keys) {
-		std::string value;
-		if (!section->Get(key.c_str(), &value, nullptr)) {
-			continue;
-		}
+	auto map = section->ToMap();
 
+	for (const auto &iter : map) {
+		const std::string &value = iter.second;
 		// Parse the string.
 		PlayTime gameTime{};
 		if (2 == sscanf(value.c_str(), "%d,%llu", &gameTime.totalTimePlayed, (long long *)&gameTime.lastTimePlayed)) {
-			tracker_[key] = gameTime;
+			tracker_[iter.first.c_str()] = gameTime;
 		}
 	}
 }