Organize usings on changed files

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers/DocumentationRules/GenericTypeParameterDocumentationAnalyzer.cs

@@ -4,7 +4,6 @@
 namespace StyleCop.Analyzers.DocumentationRules
 {
     using System;
-    using System.Collections.Generic;
     using System.Collections.Immutable;
     using System.Linq;
     using System.Xml.Linq;

StyleCop.Analyzers/StyleCop.Analyzers/DocumentationRules/SA1605PartialElementDocumentationMustHaveSummary.cs

@@ -3,13 +3,11 @@
 
 namespace StyleCop.Analyzers.DocumentationRules
 {
-    using System;
     using System.Collections.Immutable;
     using System.Linq;
     using System.Xml.Linq;
     using Helpers;
     using Microsoft.CodeAnalysis;
-    using Microsoft.CodeAnalysis.CSharp;
     using Microsoft.CodeAnalysis.CSharp.Syntax;
     using Microsoft.CodeAnalysis.Diagnostics;