Remove Timeline Header and description

[RishiRajSahu]

Expected behavior

Actual behavior

Timeline Header and description should not be displayed

[maxceem]

@RishiRajSahu So we just hide them visually, but they still stay in the model (backend), correct?

[RishiRajSahu]

fyi @maxceem this got reverted somehow, #2400.
Hot-fixing it.

[RishiRajSahu]

Done with #2616