revert portfolio cache

src/main/java/com/danielbohry/stocks/service/PortfolioService.java

@@ -10,7 +10,6 @@ import com.danielbohry.stocks.repository.PortfolioRepository;
 import com.danielbohry.stocks.service.ExchangeService.ExchangeRateResponse;
 import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Service;
 
 import java.math.BigDecimal;
@@ -40,7 +39,6 @@ public class PortfolioService {
         return repository.findAllPortfolioIds();
     }
 
-    @Cacheable(value = "portfolio", key = "#username + '_' + #currency")
     public List<Portfolio> getByUser(String username, String currency) {
         List<Portfolio> portfolios = repository.findAllByUsername(username);