chore: remove unnecessary dependencies

Signed-off-by: Weihan Li <[email protected]>

Author: WeihanLi

Diff for: build/Common.props

@@ -18,8 +18,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Collections.Immutable" />
-    <PackageReference Include="System.Threading.Channels" />
+    <PackageReference Include="System.Collections.Immutable" Condition="'$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'netstandard2.0'" />
+    <PackageReference Include="System.Threading.Channels" Condition="'$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'netstandard2.0'" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(OS)' == 'Unix'">