I think that means customising a skin to remove the elements that reference [Time]
https://wiki.jriver.com/index.php/Theater_View_Skinning_Tutorialfor example, Obsidian/main.xml is based on Shared/Base 2.xml and that contains
<TEXT>
<Item Text="[Time]" Location="*" TextColor="FFFFFF" Rect="RootText\50,0,100,100" Capitalization="0" Alignment="1" Alpha="50" Size="[Medium Text Height]" />
<Item Text="[Time]" Location="[Television Guide]" TextColor="FFFFFF" Rect="Titlebar\80,0,98,100" Capitalization="0" Alignment="1" Alpha="50" Size="[Medium Text Height]" />
<Item Text="[Time]" Location="*\***" TextColor="FFFFFF" Rect="Titlebar\80,0,98,100" Capitalization="0" Alignment="1" Alpha="50" Size="[Medium Text Height]" />
</TEXT>
I think this means the time is put in the specified location on the screen for the pages referenced by the "Location" element.
I've never written a skin so can't give you a concrete way to fix this but, if it were me, then I would guess copying your existing skin (merging with the specified base xml) and just commenting out those elements that mention time should do the trick.