move license to props

Author: SimonCropp

Directory.Build.props

@@ -3,6 +3,7 @@
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
     <Authors>Microsoft</Authors>
     <Company>Microsoft</Company>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference

src/Microsoft.OpenApi.Hidi/Microsoft.OpenApi.Hidi.csproj

@@ -9,7 +9,6 @@
     <Nullable>enable</Nullable>
     <PackageIconUrl>http://go.microsoft.com/fwlink/?LinkID=288890</PackageIconUrl>
     <PackageProjectUrl>https://github.com/Microsoft/OpenAPI.NET</PackageProjectUrl>
-    <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <ToolCommandName>hidi</ToolCommandName>
     <PackageOutputPath>./../../artifacts</PackageOutputPath>

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

@@ -5,7 +5,6 @@
         <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
         <PackageIconUrl>http://go.microsoft.com/fwlink/?LinkID=288890</PackageIconUrl>
         <PackageProjectUrl>https://github.com/Microsoft/OpenAPI.NET</PackageProjectUrl>
-        <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
         <Version>1.6.9</Version>
         <Description>OpenAPI.NET Readers for JSON and YAML documents</Description>

src/Microsoft.OpenApi/Microsoft.OpenApi.csproj

@@ -5,7 +5,6 @@
         <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
         <PackageIconUrl>http://go.microsoft.com/fwlink/?LinkID=288890</PackageIconUrl>
         <PackageProjectUrl>https://github.com/Microsoft/OpenAPI.NET</PackageProjectUrl>
-        <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
         <Version>1.6.9</Version>
         <Description>.NET models with JSON and YAML writers for OpenAPI specification</Description>