Enable implicit usings (#3316)

Enable implicit using statements.

Author: martincostello

Directory.Build.props

@@ -12,10 +12,7 @@
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <EnablePackageValidation>$(IsPackable)</EnablePackageValidation>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
-    <!--
-    TODO Go through the code and tidy up the usings
     <ImplicitUsings>enable</ImplicitUsings>
-    -->
     <IncludeSymbols>true</IncludeSymbols>
     <LangVersion>latest</LangVersion>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>

perf/Swashbuckle.AspNetCore.Benchmarks/XmlCommentsBenchmark.cs

@@ -1,6 +1,4 @@
-using System.Collections.Generic;
-using System.IO;
-using System.Reflection;
+using System.Reflection;
 using System.Xml;
 using System.Xml.XPath;
 using BenchmarkDotNet.Attributes;

src/Swashbuckle.AspNetCore.Annotations/AnnotationsDocumentFilter.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using Microsoft.AspNetCore.Mvc.Controllers;
+using Microsoft.AspNetCore.Mvc.Controllers;
 using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.SwaggerGen;
 

src/Swashbuckle.AspNetCore.Annotations/AnnotationsOperationFilter.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using Microsoft.OpenApi.Models;
+using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.SwaggerGen;
 
 namespace Swashbuckle.AspNetCore.Annotations

src/Swashbuckle.AspNetCore.Annotations/AnnotationsParameterFilter.cs

@@ -1,5 +1,4 @@
-using System.Linq;
-using System.Reflection;
+using System.Reflection;
 using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.SwaggerGen;
 

src/Swashbuckle.AspNetCore.Annotations/AnnotationsRequestBodyFilter.cs

@@ -1,5 +1,4 @@
-using System.Linq;
-using System.Reflection;
+using System.Reflection;
 using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.SwaggerGen;
 

src/Swashbuckle.AspNetCore.Annotations/AnnotationsSchemaFilter.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Reflection;
+using System.Reflection;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.SwaggerGen;

src/Swashbuckle.AspNetCore.Annotations/AnnotationsSwaggerGenOptionsExtensions.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.Json.Serialization;
+using System.Text.Json.Serialization;
 using Swashbuckle.AspNetCore.SwaggerGen;
 using Swashbuckle.AspNetCore.Annotations;
 

src/Swashbuckle.AspNetCore.Annotations/SwaggerDiscriminatorAttribute.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace Swashbuckle.AspNetCore.Annotations
+namespace Swashbuckle.AspNetCore.Annotations
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Interface, AllowMultiple = false)]
     public class SwaggerDiscriminatorAttribute : Attribute

src/Swashbuckle.AspNetCore.Annotations/SwaggerOperationAttribute.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace Swashbuckle.AspNetCore.Annotations
+namespace Swashbuckle.AspNetCore.Annotations
 {
     /// <summary>
     /// Enriches Operation metadata for a given action method