feat: Remove list helpers

Use the collection package instead.

lib/lists.dart

@@ -1,16 +0,0 @@
-/// A wrapper around List<T>.firstWhere that does not throw but instead just
-/// returns true if [test] returns true for an element or false if [test] never
-/// returned true.
-bool listContains<T>(List<T> list, bool Function(T element) test) {
-  return firstWhereOrNull<T>(list, test) != null;
-}
-
-/// A wrapper around [List<T>.firstWhere] that does not throw but instead just
-/// return null if [test] never returned true
-T? firstWhereOrNull<T>(List<T> list, bool Function(T element) test) {
-  try {
-    return list.firstWhere(test);
-  } catch(e) {
-    return null;
-  }
-}

lib/moxlib.dart

@@ -1,5 +1,4 @@
 library moxlib;
 
 export 'awaitabledatasender.dart';
-export 'lists.dart';
 export 'math.dart';