Remove dead code

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers/GeneratedCodeAnalysisExtensions.cs

@@ -114,12 +114,6 @@ private static bool IsGeneratedDocumentNoCache(SyntaxTree tree, CancellationToke
         private static bool HasAutoGeneratedComment(SyntaxTree tree, CancellationToken cancellationToken)
         {
             var root = tree.GetRoot(cancellationToken);
-
-            if (root == null)
-            {
-                return false;
-            }
-
             var firstToken = root.GetFirstToken();
             SyntaxTriviaList trivia;
             if (firstToken == default(SyntaxToken))
@@ -178,12 +172,6 @@ private static bool IsGeneratedFileName(string filePath)
         private static bool IsEmpty(SyntaxTree tree, CancellationToken cancellationToken)
         {
             var root = tree.GetRoot(cancellationToken);
-
-            if (root == null)
-            {
-                return false;
-            }
-
             var firstToken = root.GetFirstToken(includeZeroWidth: true);
 
             return firstToken.IsKind(SyntaxKind.EndOfFileToken)