Revert "Add a banner to encrypted rooms with visible history. (#4738)" (#4850)

This reverts commit aa525a52b1.

ElementX/Sources/Screens/RoomScreen/RoomScreenViewModel.swift

@@ -101,9 +101,6 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
                 Task { await resolveIdentityPinningViolation(userID) }
             case .resolveVerificationViolation(let userID):
                 Task { await resolveIdentityVerificationViolation(userID) }
-            case .dismissHistoryVisibleAlert:
-                appSettings.acknowledgedHistoryVisibleRooms.insert(roomProxy.id)
-                state.footerDetails = nil
             }
         case .acceptKnock(let eventID):
             Task { await acceptKnock(eventID: eventID) }
@@ -345,16 +342,6 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
             state.canDeclineKnocks = powerLevels.canOwnUserKick()
             state.canBan = powerLevels.canOwnUserBan()
         }
-        
-        // Whever the user opens a room with joined history visibility, we clear the dismiss flag to ensure that the banner is displayed again if the history is made visible in the future.
-        if roomInfo.historyVisibility == RoomHistoryVisibility.joined {
-            appSettings.acknowledgedHistoryVisibleRooms.remove(roomInfo.id)
-            state.footerDetails = nil
-        }
-        // Whenever the user opens an encrypted room with non-join history visbility, we show them a warning banner if they have not already dismissed it.
-        else if roomInfo.isEncrypted, !appSettings.acknowledgedHistoryVisibleRooms.contains(roomInfo.id) {
-            state.footerDetails = .historyVisible(learnMoreURL: appSettings.historyVisibleDetailsURL)
-        }
     }
     
     private func setupPinnedEventsTimelineItemProviderIfNeeded() {