🐛 fix: Remover import no usado en tests de integración

- Remover import 'github.com/stretchr/testify/assert' que no se estaba usando
- Mantener solo 'github.com/stretchr/testify/suite' que sí se utiliza
- Arregla error de go vet en CI/CD pipeline

Author: GianfrancoD

tests/integration/api_test.go

@@ -10,7 +10,6 @@ import (
 	"testing"
 
 	"github.com/gin-gonic/gin"
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 
 	"tecnica_backend/internal/adapters/primary/http/handlers"