Delete unused code

[Aliss55]

https://github.com/Aliss55/Paradis/blob/ee7e13e18e0bf24f6b0b9e418189eff4aaa9b3a2/FrontEnd/TerminalProject/src/app/components/activities/shared/complete-sentences-input/complete-sentences-input.component.html#L9C1-L9C60