Update configuration.md
Update configuration.md

Removed ```route``` parameters unused
prolixtechnikos/LiipImagineBundle,robfrawley/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,liip/LiipImagineBundle,robfrawley/LiipImagineBundle,liip/LiipImagineBundle