Remove win7 from daily builds (#32684)

* remove win7 from daily builds

* issue link

eng/targets/Helix.Common.props

@@ -28,7 +28,8 @@
     <HelixAvailableTargetQueue Include="(Alpine.312.Amd64.Open)[email protected]/dotnet-buildtools/prereqs:alpine-3.12-helix-20200908125345-56c6673" Platform="Linux" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetArchitecture)' == 'x64' AND '$(IsHelixDaily)' == 'true' AND '$(_UseHelixOpenQueues)' == 'true'">
-    <HelixAvailableTargetQueue Include="Windows.7.Amd64.Open" Platform="Windows" />
+    <!-- TODO Re-enable Win-7 queue when dotnet restore are fixed. https://github.com/dotnet/aspnetcore/issues/32683 -->
+    <!-- <HelixAvailableTargetQueue Include="Windows.7.Amd64.Open" Platform="Windows" /> -->
     <HelixAvailableTargetQueue Include="Windows.81.Amd64.Open" Platform="Windows" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetArchitecture)' == 'x64' AND '$(IsHelixDaily)' == 'true' AND '$(_UseHelixOpenQueues)' != 'true'">