Delete

src/Features/CSharp/Portable/CodeFixes/AddExplicitCast/AddExplicitCastCodeFixProvider.cs

@@ -103,8 +103,5 @@ out ImmutableArray<(ExpressionSyntax, ITypeSymbol)> potentialConversionTypes)
 
         protected override CommonConversion ClassifyConversion(SemanticModel semanticModel, ExpressionSyntax expression, ITypeSymbol type)
             => semanticModel.ClassifyConversion(expression, type).ToCommonConversion();
-
-        //protected override SymbolInfo GetSpeculativeAttributeSymbolInfo(SemanticModel semanticModel, int position, AttributeSyntax attribute)
-        //    => semanticModel.GetSpeculativeSymbolInfo(position, attribute);
     }
 }