remove unused using

src/SimpleStateMachine.StructuralSearch.Tests/PlaceholderParserTests.cs

@@ -1,5 +1,4 @@
 using System.Linq;
-using Pidgin;
 using Xunit;
 
 namespace SimpleStateMachine.StructuralSearch.Tests;

src/SimpleStateMachine.StructuralSearch/Helper/StringHelper.cs

@@ -1,5 +1,4 @@
-using System.Linq;
-using System.Text;
+using System.Text;
 
 namespace SimpleStateMachine.StructuralSearch.Helper;
 

src/SimpleStateMachine.StructuralSearch/Parsers/ParserWithContext.cs

@@ -1,6 +1,4 @@
-using Pidgin;
-
-namespace SimpleStateMachine.StructuralSearch;
+namespace SimpleStateMachine.StructuralSearch;
 
 // public abstract class ParserWithContext<TToken, T> : Parser<TToken, T>
 // {

src/SimpleStateMachine.StructuralSearch/StructuralSearch/StructuralSearch.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-using SimpleStateMachine.StructuralSearch.ReplaceTemplate;
+using SimpleStateMachine.StructuralSearch.ReplaceTemplate;
 using SimpleStateMachine.StructuralSearch.Rules;
 
 namespace SimpleStateMachine.StructuralSearch

src/SimpleStateMachine.StructuralSearch/StructuralSearchParser.cs

@@ -1,6 +1,5 @@
 
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using SimpleStateMachine.StructuralSearch.Configurations;
 using SimpleStateMachine.StructuralSearch.Extensions;