Remove flag RoomListFilters.

This is also fixing the filter reset issue when going back to the room list.

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -75,13 +75,6 @@ enum class FeatureFlags(
         defaultValue = true,
         isFinished = false,
     ),
-    RoomListFilters(
-        key = "feature.roomlistfilters",
-        title = "Room list filters",
-        description = "Allow user to filter the room list",
-        defaultValue = true,
-        isFinished = false,
-    ),
     RoomDirectorySearch(
         key = "feature.roomdirectorysearch",
         title = "Room directory search",