Remove AbsoluteServerTimes experiment

It is currently disabled. Removing it will simplify another piece of work: guardian/dotcom-rendering#14660

See more here: https://docs.google.com/document/d/1tecB_0ytdAK9XLcjTpumdHUD04-TCDuqDNsxlk5kCnI/edit?tab=t.0#heading=h.2736oayszx8j

Author: ioannakok

common/app/conf/switches/JournalismSwitches.scala

@@ -70,15 +70,4 @@ trait JournalismSwitches {
     exposeClientSide = true,
     highImpact = false,
   )
-
-  val AbsoluteServerTimes = Switch(
-    SwitchGroup.Journalism,
-    name = "absolute-server-times",
-    description = "Force times on the server to be absolute to improve caching",
-    owners = Seq(Owner.withEmail("[email protected]")),
-    safeState = Off,
-    sellByDate = never,
-    exposeClientSide = true,
-    highImpact = false,
-  )
 }