chore: linting

Signed-off-by: Vincent Biret <vibiret@microsoft.com>

Author: baywet

src/Microsoft.OpenApi/Models/OpenApiComponents.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using Microsoft.OpenApi.Interfaces;
 using Microsoft.OpenApi.Models.References;
 using Microsoft.OpenApi.Writers;