PERFORMANCE: Lucene.Net.Util.Automaton.SortedInt32Set: Removed unnecessary IEquatable<T> implementations and converted FrozenInt32Set into a struct.
PERFORMANCE: Lucene.Net.Util.Automaton.SortedInt32Set: Removed unnecessary IEquatable<T> implementations and converted FrozenInt32Set into a struct.

apache/lucenenet,apache/lucenenet,jeme/lucenenet,apache/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,apache/lucenenet