Remove unused method.

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/ILocalizationDictionary.cs

@@ -23,7 +23,5 @@ namespace Volo.Abp.Localization
         IReadOnlyList<LocalString> GetAllStrings();
 
         void Extend(ILocalizationDictionary dictionary);
-
-        void Clear();
     }
 }

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/LocalizationDictionary.cs

@@ -45,11 +45,6 @@ namespace Volo.Abp.Localization
             }
         }
 
-        public void Clear()
-        {
-            _dictionary.Clear();
-        }
-
         /// <inheritdoc/>
         public virtual IEnumerator<LocalString> GetEnumerator()
         {