Remove dependency on external lib that uses YamlDotNet to reduce ambiguity

Author: MaggieKimani1

src/Microsoft.OpenApi.Readers/Microsoft.OpenApi.Readers.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFramework>netstandard2.0</TargetFramework>
         <LangVersion>latest</LangVersion>
@@ -21,7 +21,6 @@
         <PackageReference Include="JsonSchema.Net" Version="4.1.5" />
         <PackageReference Include="JsonSchema.Net.OpenApi" Version="1.1.0" />
         <PackageReference Include="SharpYaml" Version="2.1.0" />
-        <PackageReference Include="Yaml2JsonNode" Version="1.1.1" />
         <PackageReference Include="System.Text.Json" Version="7.0.2" />
     </ItemGroup>
 

test/Microsoft.OpenApi.Readers.Tests/Microsoft.OpenApi.Readers.Tests.csproj

@@ -25,7 +25,6 @@
         <PackageReference Include="SharpYaml" Version="2.1.0" />
         <PackageReference Include="xunit" Version="2.6.2" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4" PrivateAssets="all" />
-        <PackageReference Include="Yaml2JsonNode" Version="1.1.1" />
     </ItemGroup>
 
     <ItemGroup>