Use SourceLink from SDK (#62)

Author: sungam3r

src/Directory.Build.props

@@ -11,7 +11,6 @@
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageIcon>icon.png</PackageIcon>
-    <RepositoryType>git</RepositoryType>
     <DebugType>embedded</DebugType>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
@@ -31,7 +30,6 @@
   <ItemGroup Condition="'$(IsPackable)' == 'true'">
     <None Include="..\..\assets\icon.png" Pack="true" PackagePath="\" Visible="false" />
     <None Include="..\..\README.md" Pack="true" PackagePath="\" Visible="false" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
     <PackageReference Include="MinVer" Version="6.0.0" PrivateAssets="All" />
   </ItemGroup>