Remove unused key in pinyin alphabet

Author: VictoriousRaptor

Flow.Launcher.Infrastructure/PinyinAlphabet.cs

@@ -83,7 +83,6 @@ public bool ShouldTranslate(string stringToTranslate)
             map.endConstruct();
 
             var key = resultBuilder.ToString();
-            map.setKey(key);
 
             return _pinyinCache[content] = (key, map);
         }

Flow.Launcher.Infrastructure/TranslationMapping.cs

@@ -12,13 +12,6 @@ public class TranslationMapping
         private List<int> translatedIndexs = new List<int>();
         private int translatedLength = 0;
 
-        public string key { get; private set; }
-
-        public void setKey(string key)
-        {
-            this.key = key;
-        }
-
         public void AddNewIndex(int originalIndex, int translatedIndex, int length)
         {
             if (constructed)