Remove unnecessary null check

Author: sharwell

AsyncUsageAnalyzers/AsyncUsageAnalyzers.CodeFixes/Helpers/RenameHelper.cs

@@ -21,7 +21,7 @@ public static async Task<Solution> RenameSymbolAsync(Document document, SyntaxNo
             var annotatedToken = annotatedRoot.FindToken(declarationToken.SpanStart);
 
             var semanticModel = await annotatedDocument.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
-            var symbol = semanticModel?.GetDeclaredSymbol(annotatedToken.Parent, cancellationToken);
+            var symbol = semanticModel.GetDeclaredSymbol(annotatedToken.Parent, cancellationToken);
 
             var newSolution = await Renamer.RenameSymbolAsync(annotatedSolution, symbol, newName, null, cancellationToken).ConfigureAwait(false);