Revert "Correct speed of retraction"
Revert "Correct speed of retraction"

This reverts commit 6925f3942608c58a729991345b03f9b90c5aa7bc.

Contributes to issue CURA-2795.

Ultimaker/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine