Add Unit tests for Grapheme

Author: EYHN

osu-framework.sln.DotSettings

@@ -999,7 +999,6 @@ private void load()
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Kiai/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Leaderboard/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Leaderboards/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=Noto/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Playfield/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=resampler/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=ruleset/@EntryIndexedValue">True</s:Boolean>