two page titles, want other away

Hello, this theme is adding two page titles, first one to header image and second one top of the content. I want to leave header image title and take away title from the content area. When I use following code it takes both away, which code will only take away title from the content area?

.entry-title {
  display:none; }

see issue here https://sivakanlava.fi/?page_id=25 cheers! mrblues