chore(neon_talk): Remove unused helper extensions

Signed-off-by: provokateurin <kate@provokateurin.de>

Author: provokateurin

packages/neon/neon_talk/lib/src/utils/helpers.dart

@@ -23,12 +23,6 @@ extension ChatMessageHidden on spreed.$ChatMessageInterface {
   bool get isHidden => _hiddenMessages.contains(systemMessage);
 }
 
-/// Helper extension for [spreed.$BaseMessageInterface]
-extension $BaseMessageInterfaceHelpers on spreed.$BaseMessageInterface {
-  /// Parsed equivalent of [expirationTimestamp].
-  tz.TZDateTime get parsedExpirationTimestamp => DateTimeUtils.fromSecondsSinceEpoch(tz.local, expirationTimestamp);
-}
-
 /// Helper extension for [spreed.$ChatMessageInterface]
 extension $ChatMessageInterfaceHelpers on spreed.$ChatMessageInterface {
   /// Parsed equivalent of [timestamp].
@@ -39,18 +33,6 @@ extension $ChatMessageInterfaceHelpers on spreed.$ChatMessageInterface {
       lastEditTimestamp != null ? DateTimeUtils.fromSecondsSinceEpoch(tz.local, lastEditTimestamp!) : null;
 }
 
-/// Helper extension for [spreed.$ChatReminderInterface]
-extension $ChatReminderInterfaceHelpers on spreed.$ChatReminderInterface {
-  /// Parsed equivalent of [timestamp].
-  tz.TZDateTime get parsedTimestamp => DateTimeUtils.fromSecondsSinceEpoch(tz.local, timestamp);
-}
-
-/// Helper extension for [spreed.$ReactionInterface]
-extension $ReactionInterfaceHelpers on spreed.$ReactionInterface {
-  /// Parsed equivalent of [timestamp].
-  tz.TZDateTime get parsedTimestamp => DateTimeUtils.fromSecondsSinceEpoch(tz.local, timestamp);
-}
-
 /// Returns if the Talk [feature] is supported on the instance.
 bool hasFeature(BuildContext context, String feature) {
   final capabilitiesBloc = NeonProvider.of<CapabilitiesBloc>(context);